From what I understand the reason why YC is offering this Advisor Edition classes is to get these non-YC alum advisers ready for the regular version of the YC Startup school.
Last year YC accepted everyone into YC startup school (due to a Boolean error) and a lot of groups ended up participating without an adviser. And you get the best experience when someone actually guides you every week.
This year YC will again open the YC Startup School for everyone and YC can't scale it without having trained advisers.
Finally, I wouldn't worry too much about "advisers without experience." YC is smart enough to filter out bad apples from the bag.
Last year YC accepted everyone into YC startup school (due to a Boolean error) and a lot of groups ended up participating without an adviser. And you get the best experience when someone actually guides you every week.
This year YC will again open the YC Startup School for everyone and YC can't scale it without having trained advisers.
Finally, I wouldn't worry too much about "advisers without experience." YC is smart enough to filter out bad apples from the bag.