Is it your belief that meditation just causes the mind to be numb?

In another question, someone suggested that meditation just made your mind numb and empty, and then it was in danger of being filled with wrong thoughts.
I don’t know if they meant it became the Devil’s Playground after that or not.

I’ve never felt that way in meditation, and I wonder if this is a popular Christian belief, that prayer is good but meditation is not.

If you aren’t asking God for anything other than His blessed company and help in becoming a more pure and moral being, doesn’t the line between prayer and meditation dissolve?