Developers do that too. Consultants have be doing rescue projects for quite a long time. I don't think anything has or will change on that front.
Regardless this just made me shudder thinking about the weird little ocean of (now maybe dwindling) random underpaid contract jobs for a few hours a month maintaining ancient Wordpress sites...
Surely that can't be our fate...
Not at that speed. Scale remains to be seen, so far I'm aware only of hobby-project wreck anecdotes.