Look at any pro singer using a normal mike... In and out like crazy!

You have to have quite a good compressor to be able to use your full voice range if the mike is planted an inch away from your mouth. Sure, you can learn to restrict what you can, and control it yourself. But you aren't using your FULL voice if you do. It's like deciding to never play ff or pp, and just play mp to mf. You COULD do it, but why would you WANT to? LOL