When the alternative is a game of “find the cancel link”, slog of retention attempts, or gauntlet of phone bots it starts to become tempting.
If services universally had an obvious cancel button that did exactly what it says it does without a runaround, then yeah the premium makes zero sense.
There's the other alternative which is similar to this App Store Bill: get the government involved. In California if you signed up with a button, you've got to be able to cancel with a button too. I like that way more than paying 20% to Apple just because they offer the same thing.