Perhaps you should place a small hammer and a 1/8” pin punch in your medicine cabinet, to pop the hinge pins. Then the size of your knife wouldn’t matter at all.I don't believe I've ever felt "under knifed". I have typically chosen my carry knives based on what I thought I would use/need them for that day. If I thought I would need a heavy-duty fixed-blade that day, that's what I carried. If I thought I would need a small knife for light cutting that day, that's what I carried. I usually get it right.
I've never suddenly found myself stranded in the woods, needing to build a shelter with only a small folder, or equipped with only a big fixed-blade, and needing to perform emergency surgery on someone.
The only time I can think of when I might have come close to feeling "under knifed" was when I got trapped in my home bathroom by a busted door knob.
Parker