When the job's done, your customer stands back and loves it. Then they try to write a review and all they can think of is "looks great, very happy." True, and useless, because it's the same thing they'd say about a buddy with a roller who botched the last room.
Everything that makes you a professional, the prep, the crisp edges, the protected floors, the crew that cleaned up every night, is invisible in the finished wall. The homeowner lived through all of it and doesn't think to mention a word.
And the prep is the whole game. A rushed job and a careful one look identical on day one and completely different in a year. The customer who got the careful version has no way to prove it on Google unless their review names it, which is where most painting reviews stall.