You need your sidearm in Condition 1 when facing a threat. Laser sights are for hunting or street sweeping with rifles. Most gunfights take place within 7 feet of each other. A belly gun may be just as effective as a pistol given a proper caliber.
Most, but far from all. I found that out when a guy 30 yards away from me deep into road rage reached behind the seat of his truck, and I was pretty sure he was going for a long gun - and I was carrying a Ruger LC9 with itty bitty sights. I wasn't the one he had the beef with (actually, I think he picked a fight because they were old and frail and he was a strapping young indignant fellow with his wife in the truck to impress), but the parking lot was nearly empty and I was the sole witness - and I'd have had to go
toward him to reach my car, and there was no good cover. I car will sort of do it if you can be in the right place, but I've shot through enough junkers with an old and slow .45 Long Colt to know that's pretty iffy cover at best, even if you
can find a place behind the engine block and wheel.
Back to the incident - hankfully he thought better of it I suspect thanks to his wife, got in his bro-dozer and left, but I've never carried just a belly gun since. A job worth doing is worth doing right, and I pick the gun first and the carry method second with an eye to comfort if possible. If it isn't comfortable to carry, I keep looking for a better carry system, not a less capable gun. These days with everybody and their brother making Kydex holsters, One of them is bound to make one that's right for you. It's the same as it ever was, you're probably going to end up with a box of "almost" holsters until you find the sweet spot. If you carry a naked gun with a rail I'd recommend the Q-Series holsters (
https://qseriesllc.com) if they make one for your gun.
I'm a big fan of the light/laser combo if you can make it work for your body type (I can't, yet, but I haven't given up and I want a system that turns itself on as you draw. It may be a while before I find the right set-up, but I'm still not settling for a smaller gun just to make it easier). You might be in a big store when a storm takes the lights out and some people will go nuts trying to steal shit and run out the door and they will hurt people they see as obstructions. If you don't believe me, do a search on Youtube with appropriate wording. A light lets you see (although you shouldn't make a habit of searching with your weapon-mounted light you can still get a pretty good picture using the "spill" from the light without pointing it directly at them.), and the laser lets you make hits from awkward positions such as a very tight retention stance with the gun near your belt, or a situation where you can see the bad guy but there isn't room for sight picture. You can practice all you want, but unless you're Jerry Miculek or someone of similar skills you're probably not going to get solid hits from that stance using the irons. Another thing I stongly recommend for people not concerned about how they dress is to wear a baseball cap or other brimmed cap - if the sun is in your eyes, or
if the bad guy also has a flashlight, it can keep you from being completely blinded simply by tilting your head down. Even in the most extreme body positions, unless someone's hanging from the ceiling or in some other ridiculous posture, his body is an easily perceivable distance and direction above his feet, and you can tell by foot placement about where that is.
As an "aside", when I go places like doctor's office where guns aren't allowed, I replace it with a Matriarch in my front pocket. It isn't a gun, but it opens faster than I can open my PM2. If I need to go out at night I also carry a little Tops "GTFOffMe" blade on my offside a bit away from my center-line, so that if I end up in a struggle for the gun or just for my life, I have something at hand to discourage it long enough, hopefully, to draw unless the guy runs away, which is in my mind a nearly-ideal situation as long as I can identify him and have witnesses.
I do agree with your stand on Condition One - maybe if you're in the military your situation gives you time to rack a round into the slide, but honestly I doubt it no matter what the military teaches. Videos of the Israeli army have shown me that can be quick - but not as quick as a simple draw and fire. Different strokes, different folks. I've seen enough things happen or almost happen as a civilian that I know that by the time you realize things are "popping off" you're chance to respond in a helpful way may almost be over.