Allow Admins to make membership in a Forum AUTOMATIC for all users

I asked the question to Ryver Support and they replied.

QUESTION to Ryver Support:
I have noticed that the only Forum that has all the employees of the company in its roster is the ALL HANDS.  I have also noticed that less than half of our users have joined to the other forums.  Is there any way to make other forums MANDATORY or AUTOMATIC JOIN or whatever you call it by ALL USERS?

ANSWER by Ryver Support:
That is correct. The only Forum that all users must be joined to (and cannot leave) is the “All Hands” Forum.  We do have a Feedback Item to add a Forum setting that will mimic the “All Hands” - force going all members but this has not yet been scheduled.  You can “Force” join users by adding their email addresses in the “Invite user” item on the Navbar and adding the Forum name(s) you want them to join. I recommend using the “Looking to invite a lot of people” link so you can add multiple email addresses.  If you add/have a nickname to your Forums, you can add the following to a chat message in “All Hands” to request that they join. The “+nickname” creates a link to the forum. If they click and move to the Forum - they will be joined.:
Hey @team - please check out our new forum for xxxxx +nickname

I still think that when an creating a Forum, the Admin should be able to choose if joining the forum is voluntary or automatic.  That setting could be toggled at any time by the General Admin or the Forum Admin.