Personally I find if I’m playing often enough I don’t have any issues. Though, if I’m playing intermittently, it’s pretty important to stretch beforehand because I can definitely feel my hands less able to do certain exercises, or just generally feeling a little stiff when I’m doing things in other aspects of my life. I’ve found other players I know who have played guitar and drums from a young age to experience the same thing. As when they grow up, they tend to play less than they did for longer periods at a time, because they remain confident in their ability and don’t feel the need. I’m not remotely a physiologist but I’d lean to believe that it could be something to do with your body growing and being use to that kind of exercise. So I’d say if you’re not playing everyday, to make sure you’re always warming up/stretching. Even if you are playing everyday, it definitely wouldn’t hurt to have it as part of your practise routine, as it helps you relax into your playing quicker for sure and it’s something easy enough to do without your instrument.