Why? Unless they also provide their own secure cloud for storage and sync in that price I don't see the issue. Plenty of quality apps are one-time-purchase to own. To me subscriptions are a scam waiting for the rug-pull to happen(a PE/VC fund buys them and fucks over their existing consumers).
My favorite example is Beyond Compare. Pay once for the cross platform app and get free updates for each minor version, then you get a discount if you want to pay again to upgrade to the next major version. Or Plex Premium.
Other apps have teams that do the same things, with one-time purchases, like in my examples above.
As a SW dev I can empathize with your PoV, but from the perspective of an end consumer, I don't care about the externalities of the manufacturer of the product, I only care about value for my money.
When you need to buy a new t-shirt, do you go and buy the one from the manufacturer that feeds the most families or do you buy the best value one from the nearest Walmart/Target/GAP that fulfills your needs for the best value (most likely made in an Asian sweatshop)? That's how most consumers think, including you.
The costs, risks and dependencies of the manufacturer/vendor are irelevant to the end consumer, that's the cold harted calculated truth of how the free market capitalism works, and how it decides who lives and who dies.
