I'm sure you've heard this before, but Beta software should only be installed on non-production and non-critical systems.
And Betas do not linearly become more stable. One version may be "stable" and the next breaks all kinds of things.
I have zero compassion for someone who bricks a mission critical system with a Beta and a then cries out for help.
Having said that, I have put Betas on things I shouldn't have, but at least I knew what I was doing and had a good backup to restore to. But I've also had enough problems that it isn't worth it to me to be able to play with the latest system at the risk of things going wrong.
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My kids are all grown, but it seems like there should be a parental settings feature on iOS (and there may be, since I haven't had any need to look for it.) This would be a great place to enforce the use of DNDWD.
What you are asking for is different, as it sounds like you wouldn't be moving while this happens, which is required for DNDWD to kick in.