I started out deer hunting at 12 years old and carried and used a bigger 5" to 7" blades and they worked fine. One was a larger Marbles and the other was a Dextar Russell butcher style knife of some type. And once in a pinch I field dressed and skinned out a whitetail with a SAK Farmer.
As I got a little older and got some experience under my belt I found that the smaller knives I used much more often on small game, birds, and while running my traplines that had a 3" to 3 1/2" blade were my preference for field dressing and skinning game. So I've used knives in the 3" to 4" range for 40 plus years on everything from squirrels to elk.
The last 10 years or so I've been lucky enough to buy some great knives from several of the talented makers here on our forums and have enjoyed using them. All are in the 3" - 4" range which is just my personal preference.
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A caveat ... Processing big game is a completely different chore as opposed to field dressing and although you can accomplish it with the smaller blades I use to field dress animalls, to do it right imho requires different tools. If I'm hunting an area I need to quarter an animal and pack it out I bring along a couple 6" boning knives in my pack to break it down. If I can drag or transport the whole animal out to hang I use boning and breaking knives to process them. So if someone plans on a "one knife only solution" then I might be inclined to use a slightly longer bladed knife as well.
I guess I typed that long winded post just to say if you prefer a larger knife and it works for you I wouldn't be at all concerned with what other people say about it ... especially the online noise which I would venture to guess better than 50% of the loudest most opinionated voices haven't ever actually field dressed a deer and are just parroting something they've read or heard ... online.
If you have the skills to do the job the tool used is in big part just personal choice and isn't a huge factor as long as it's sharp.