

At some point you have to let them fail. Remind them of it again, so that when they cause a major issue in prod you can point out that you communicated it to them multiple times. If this team keeps causing outages (and aren’t covered for by other teams) then, hopefully, management high enough will become aware of it and start to crackdown on them. I know you said elsewhere you don’t want them to lose their jobs but if they can’t do it, they shouldn’t have it. It’s not like you’re sabotaging them - you’re still helping them with advice and warnings. If despite that help they still can’t get by, then them getting terminated is the remaining best outcome.
Someone I know started torrenting for the first time ever (American shows only) and cancelled their streaming services. Cancelled Prime. I’m avoiding American products as much as possible.