I try to save my money for when I need it, but I don't mind spending on my hobbies and stuff. Buying a nice PC or smartphone or tech in general is totally worth it if you think you're going to use it daily for at least a year or two. It's a decent investment.
But sometimes you just want things because they improve the quality of your life, and aren't really long term investments. Like most recently I realized that I ripped through every single pair of Vans I own skating, so I went to the outlet mall and bought a couple news pairs. They were both on sale, got BOGO 50 percent off, so only I only spent 70 bucks for two pairs of shoes. Now, if I was truly conservative with my money I wouldn't even have skateboarding as a hobby, but it brings me fulfillment and enjoyment and it's something I can do with friends, so it's worth it to me (replacing boards, shoes, wheels, etc all the time).
I personally would rather spend money on stuff like my hobbies than waste it on things that are far more "consumable" like expensive food, liquor/beer, cannabis, etc. That kind of stuff is a waste of money and only brings very short term enjoyment. Those are things (especially cannabis products) that I really, really WANT, but absolutely don't need, and my wallet is so much fatter because I cut it out of my life (at least temporarily while I focus on a few life goals).