Most quote singers today don’t sing using their diaphragms. Everything is in the upper areas of their vocal chords. They have learned to think a semi-shout on a high note is singing, when it is just shouting a note.
Reminds me of an old Steve Martin routine....
"My sister had a music teacher once, 80 year old guy, the last guy you'd expect to be weird.. but listen to this:
He wanted her to sing from her diaphragm....
I mean that would take YEARS to learn that, wouldn't it?"