Make friends or find a guild and you can play whatever you want.
If you can kill the bosses with any choice, why is your decision performance based? It doesn't make sense. People's thought process behind this doesn't make sense to me. If you don't pick the M+ Covenants, you can still kill raid bosses. If you don't pick the single target Covenants you can still do 10s in M+. I'm confused.