I mostly agree with you, except for two points (and I’m nitpicking):
1) a hashgocha which is meikil on everything will have a market; there are always people who see a kosher symbol and that’s enough for them. There are two I can think of off hand, but I won’t mention by name.
2) I don’t only have one goal in my kitchen, otherwise I would not buy any processed foods and I would do my own shechita or hire a private shochet. But the balance is different than a commercial establishment (food service or packaged goods). I (hopefully) am more focused on kashrus relative to money and convenience than they are, which is really the essence of my point.