Many of my daily tasks could be handled with an SAK instead of my more robust ("tactical") knife, but many of them couldn't. It's not that uncommon for me to need to chop, pry, pound, etc., with my knives. Even if that only comprised a small percent of my knife use, it's worth carrying the tactical knife because: when I need it, I need it. I'm outside a lot with my job, and I carry a lot of heavy stuff around while walking a lot, so I don't want to carry many specialized cutting tools when I can carry fewer that do more jobs adequately enough.
I've never understood these kinds of comments about "stuff a knife shouldn't be used for". Not all knives are the absolute optimum tool for every task, but plenty of knives are built tough enough to withstand chopping tasks, prying tasks, and so on. If a maker has designed a tool to withstand a certain kind of use, and a buyer has bought that tool with that use (among others) in mind for his particular situation, then who is anyone else to say that stuff shouldn't be done with a knife?
This "I'm finding that the only time I would need a knife that is NOT a SAK is when I am using the knife for something that I shouldn't use a knife for anyway" statement seems particularly ironic when you quickly follow it up with a sentence about the SAK's extra stuff like a bottle opener. Imagine if someone told you that you shouldn't be using an SAK to open bottles, and that you should be carrying around a dedicated bottle opener in addition to your knife, if you want to open bottles. Sounds pretty goofy, right? That's the way it sounds when people start talking about doing things with knives that knives shouldn't be used for. Let makers and users decide for themselves what stuff knives should be used for.
Until someone volunteers to be my full-time, unpaid assistant, and follow close by me, carrying my axe, prybar, shovel, hammer, saw, etc., I think I'll continue to carry and use a knife built to withstand whatever I need to do with it.
Mike
Edited to Add: On second thought, I think my comment came across too harsh, and I apologize for that. I see a lot of folks on these forums make various comments about "A knife is not a prybar" and "Chop with an axe, not a knife" and "Knives aren't made for ...[add hard use of your choice, here]" and "Use the best tool for the job" and so on. I was reacting more to that stuff than anything you said. Again, I apologize.