Yes. The family plan is very worth it.
I see people waste so much time on ads and even using the pirated alternatives, saves me alot of my time as well to troubleshoot for my family.
Especially for my mom, it seems after a certain age, your mental state is definitely reduced. She will anyhow click ads which are often scams or linked to scams, it is worth it since this effectively keeps her away from most weird scams which are clicked by accident.
For my brother and sister-in-law, they no longer need to subscribe to spotify and waste time on ads as well. Even saved a spot for my niece when she gets old enough to have her own account.
For myself, it is more of removing the hassle of troubleshooting and getting that background play feature. I use Youtube for so many things, so as a heavy user, it is worth my money. (podcasts, documentaries, food reviews, tech reviews, cooking recipes and DIY repair instructions, etc etc)
So far okay, hope they don't increase the price for family plan too much.