..you just need to Google to see the arguments against using them
Yeah I’ve seen the arguments. The two main points seem to be that A) some badly designed covers actually expose the live terminal B) kids could use the cover itself to lift socket shutters.
A) is countered by choosing better designed covers. B) is a definitely a risk BUT kids could also use an actual normal plug to do exactly the same thing (or a pencil, crayon etc etc).
To be honest I don’t think it’s a massive risk either way. The main reason I use them these days is that it looks neater. Plus it stops crap and gunk accumulating in seldom used sockets.