artists need to spend whatever amount of time they feel is necessary to generate whatever it is they generate.
I can't understand why anyone would suggest any great artist should alter their methods. especially for time sensitivity, aka entitled expectation / impatience.
If anything, I more often feel pretty much the opposite, that a lot of artists burn out too fast because they want to stay relevant, or are chasing something, forcing out too much material when if they had focused longer and harder on less, it would probably be better. (quality vs. quantity)
of course there are exceptions, but truly prolific artists who's quality doesn't falter are quite rare.