It's a matter a maturity. A 20 something year old wouldnt want to hang out with an immature 12 year old in real life, so why would they want to play video games with them? It is mostly that I don't want to spend my 1hour or so raid with a kid who is super annoying and had nothing in common with me. I would much rather spend it with a mature adult who is more on my level of maturity and let's be honest immuturity. Also, for those who used to raid with kids on Crota understand the massive arrogance of a young kid who thought he was the best sword bearer ever. But yet always seemed to die constantly and blame it on everyone else.