Nonfree (proprietary) software is very often malware (designed to mistreat the user). Nonfree software is controlled by its developers, which puts them in a position of power over the users; that is the basic injustice. The developers often exercise that power to the detriment of the users they ought to serve.
It sounds simple to say that a certain program “requires a subscription.” What that means concretely is that it contains a time bomb, so that it will refuse to operate after that date. Or else it is tethered to a server, and that server checks the date. Either one is a malicious functionality.
Adobe tools require a subscription. Adobe also tried to rip people off by making the subscriptions annual, but that is a secondary issue compared with the basic wrong of the time bomb. When a program proprietary, and even malware, don't get distracted by the secondary issues like price.
Please don't repeat the marketing term “Creative Cloud” except to express revulsion for it. The term “cloud” is designed to cloud users' minds.