We come across plenty of these but you start hacking off at the top and it comes off then a quarter of the way down it gets hard and harder. Then there is the problem of convincing the customer it needs to stay on, they don't like you going over the top. Taking it off to brick can loosen the bricks, break the machines and chisels .
That lad I have had leave me recently said he was leaving because of chest pains at 24. Partly true. I left him to hack a house off on his own while I went away on holiday. 4 days for 2 men but I left him on his own and give him 8 days money as a price. it must have been the hardest ever! He had to take the face of the bricks off! He did it on his own in 4 days and ended up in the Cardio wing at the local hossi. He had pulled a heart muscle. Did the owner of the house care? Nope.
He was never the same after that but he was a fool to himself pushing himself for the greed of money to the point of pulling a heart muscle.
So yes taking off the top coat down to a clean sound base coat then sbr-ing it is probably better sometimes than taking it back to brick. With bare brick you have suction problems and the risk of premature drying. But customers still don't like you going over the top. Some can get stroppy about it.