My brother in law is professional, he uses 1.2L
Well, I use an 85mm 1.8, and I'm a professional, too. So not sure what your point is...
FYI, I also have a 50mm 1.4 in my bag. Two quite different lenses. On a full-frame, the 85mm 1.8 is fantastic for portraiture, whereas the 50mm is excellent for being a step back from that. People standing together etc. A great "normal" lens.