When adeptima says "Keycloak is a non-brain solution" I believe that is intended as an endorsement.

Americans use the term 'no-brainer' as a positive thing - a decision so good, easy and obvious that even someone with no brain would make it.

That's in contrast to a most colloquialisms about decisions made without brain power - calling a decision 'thoughtless' or 'dumbass' would instead be a negative thing.