In the other comment, someone mention Vacheron Constantin watches can be off by as much as a minute per week! This is bad enough that I'd call a watch like that "unusable".
I don't think mine loses a minute per week, but it isn't perfect. Noticing the watch is a minute or two behind once a month and quickly popping out the dial to roll it forward is not a meaningful hassle for me.
Relative to a battery watch, it's nice that the watch is a self-contained functional unit. It will "always" be functional, even if I've left it in a drawer for a few years (always in quotes because of course anything can break).
Part of it is also just that I like to think about the mechanical complexity and elegance of it. It gives me a little bit more joy than my battery watches (but I still have plenty of battery watches that I like!), and that's something I appreciate.
Even though I am not the kind of person who would spend an insane amount of money on a watch, I still think the elegance of the manufacturing of a piece like the one under discussion is really impressive and interesting.