Partly this is true, but on the other hand it's a bit like: I'm against digital editing, because it' s much easier than cutting and connecting celluloid. (Or the monk stating the printing press will make bibles too available to the public. Or the musician against digital recording because it's easy to edit mistakes.)
No offense taken or meant, btw.
On one hand you are right: some people just paste a preset all over the place without looking what it looks like on every shot or considering whether it is the right look.
The downside of this is, that to the untrained eye (like corporate costumers) good (and time consuming) grading becomes less of a unique selling point and budget-wise harder to defend.
On the other hand it's possible to do grading faster and economicly more efficient (especially with smaller budgets).