The degree "Doctor of Philosophy" indicates and used to be synonymous with a complete, deep, and even meta-understanding of one's subject. Now, half your supposed expertise in an exponentially more complex subject is actually in arbitrarily related "professional" details.
Trades ought to be constrained to professional certificates and all PhDs should have to be philosophers first.
Every profession, particularly the deeply meaningful or complex ones, needs a cadre of philosophers to keep them on track and integrated.