You might be right. The person I know who went their for music did get a BM (and also a master’s).
One daughter was considering McGill for a different major, but we toured the music department and she asked about music lessons and events. They did state that many of the professors in the music school also give lessons on the side to augment their income. Apparently some of the music students do also. There are also performances by students very, very frequently somewhere or other on campus.
However, you are probably correct about the BM part, and the grade deflation might be something to think about for someone interested in law school afterward.