Sure, it's great for companies filtering out resume spam but how about individuals trying to avoid recruiter spam?

And beside, really good engineers are never short of good offers.

It's standard operating procedure in our industry that when a manager or even a dev leaves, they always try to take the best engineers from their past job with them.

If it's not your first job out of school and you have to rely on throwing your CV in a black hole like SO Careers or Monster and hope to get offers from strangers you're doing something very wrong.