Same reason I guess some tools are better to work with than others. I definitely like my iFixit screwdrivers set more than a generic set I've bought years before: there are more different bits actually used in things I need to disassemble and assemble, the things are sturdier, they feel nicer to hold in my hand, there is this nice magnetic pad so my screws are not lost. Now if I have no choice but this shitty screwdriver, I'll use it, sure, as long as it doesn't break (this has happened), but when I have a choice, I go for better tools.

What's so incomprehensible about this?

Of course if you do a half-assed job all the time, you may afford to not care about your tools. I want to excel at mine, so I definitely have preferences.