The process of activating and then deactivating the software is too much, in the heat of the moment.
Art is weird. I have a perpetual license for Lightroom. It's great because I can click the LR icon and boom, there it is, ready to download my photos and serve me. I don't have to measure my photography out by it, don't have to consider whether or not my LR subscription is current before I pick up the camera, I don't have to hassle with it when I need something... it's simply there.
Same with music: if an idea pops up in my head, I can click the FL-Studio icon and... there it is! Ready to go. I have a couple of plugins that need to periodically reactivate interactively, and in all honesty they simply don't get used. In the moment even load times matter, I'm not going to sit around and finagle with logins or activations or anything... I'll just move on.
I purchased a data recovery program that used to be called R-Studio a little while ago. It's great software, I used to pirate it back in the day, and its demonstrably better than most of the free data recovery apps out there. I've used it once, but again I am confident that it is there and it will run, and that I can confidently offer a data recovery service/favor to friends or customers without awkwardly futzing about or checking before-hand as to whether the software will work or not.
These are all cases where having software ready-to-go is better, and a subscription just gets in the way. I could even argue that having this stuff on-hand helped me get through some really lean times where even $10/month was a difficult price to pay.