This isnt a smart thing for them to do. Their music division is one of their only proifitable business (Next to obviously their gaming division and now their Movie division seems to be doing better with Jumanji and Homecoming) but this is a big investment for a company that was in trouble just a few years ago. hope they know what they´re doing.
No its a smart thing for them to do, its not like buying a TV company or computer company, i.e where profits can change significantly because of outside influences. Sony is buying digital content effectively. In the age of streaming etc, content is king. I just wish they would buy some movie companies and provide a single PS+ platform that had games, movies and music all included (the true Netflix of streaming).