You really did not just go there, did you? Surely not because of a parent who would be playing a game with their children supervised with parental controls set and picking and choosing the appropriate content they allow their children to play.
I have a 9 year old son and I am very careful and definitely stricter than other parents I know when it comes to gaming, tv shows, movies, social media, etc. Most parents I know let their children have Facebook, play games rated T for teen, even M for mature. They watch tv shows and movies that I don’t let my son watch. The kids add random people they meet on Xbox as friends, etc. All those things I just mentioned, I don’t allow my son to do yet at 9 years old.
What is my point to this? I am very careful with what my son does regarding his age and I think you are blowing a parent who is going to play WoW with their children supervised way out of control. WoW is one of those games I am actually considering playing with my 9 year old. Of course all chat would be off at all times, he would be supervised and he would not be allowed to invite or group with random strangers, not at 9, but that’s just me. He would be playing only with me and people we know personally. There is certain content I would not let him do, like no Forsaken, no Hillsbrad Foothills horde side, definitely not the DK starter zone or anything like that. Much of the content in WoW is fine, with some things here and there that a parent of a younger child should maybe restrict the kid doing, at least in my opinion. I personally would not join a guild with my children with a group of random strangers, but to each their own.
Thankfully my son is cool with me not allowing him to play Fortnite yet or add random strangers on his Xbox, watch certain tv shows, movies, etc. We have talks and he understands my reasoning. The biggest challenge is all his friends that are allowed to do everything a late teenager would do pressuring me to allow him to do certain things and pressuring my son. But my son just tells them no, and means it, as do I.
But a parent knows their child, much more than some random stranger on the WoW forums knows their child. Back in Vanilla we had some younger people in our guild (teens) and most of them acted more mature than most of the adults.
The rated T for teen in WoW I think is primarily regarding the online interactions and there are ways to curb that so that doesn’t happen. Parental controls are for a reason.