Is a slippery slope the concern here, or is it just a matter of principle that nobody should be allowed to mess with your machine unless you give them permissio

Is a slippery slope the concern here, or is it just a matter of principle that nobody should be allowed to mess with your machine unless you give them permission to? In this specific case, I don't have a problem with this security fix/decisions. I'm also they glad they did this for my parents since they use Mac's at home, and I'd rather things like this be fixed silently rather than me having to explain some complicated popup that showed up asking they to turn off "Java".