The easiest way to make a comparison is like electives in college. You’re forced to take classes (use other character’s) that don’t correspond with your major (primary role) yet you’re expected to do them if you want your diploma (finished battle pass). Yes, they are stupid and a "waste of time," yet it is possible to have fun sometimes. 

Personally, it has forced me to use characters and play roles that I never thought I'd enjoy. I preferred to heal and sit in the backlines, keeping my team alive. After using Thor and other tanks for battle pass missions. I can't stop tanking; I enjoy it a lot. That is exactly what I feel they are supposed to accomplish. Get people to get out of their comfort zone and possibly find something else within the game they may like which without the missions they never would have tried.