i’m not in grad school/haven’t applied for other reasons, but a big piece of advice my v wise mentor/professor in college about grad school was that she really stressed not going into debt for grad school, especially in today’s world and job market. so even if you aren’t sure you’d 100% “use” it, if it’s with scholarships and a fellowship so you graduate debt-free, worry less. on the other hand, even if you’re very sure you would “use” it but you’d have to go into debt seriously ask yourself if it’s that worth it.
if you only want a master’s (in the US), there are not always as many fellowships / assistantships for master’s students so go for a PhD program with a “terminal master’s” so you can do two years, decide if you like it, and if you don’t you still get a master’s at the two year mark (this was also advice i received). my obvious caveat is that i’m not in grad school (yet?) but i‘d literally trust this professor with my life so i trust that this advice is sage enough to pass on!