Isn't this all a bit vibrationist? Also a bit ageist and some of us are aged or ageing.
I have had a lifelong,since Sunday School, vibrato but am now out and trembling away confidently.
For years I held a hand in front of my wobbling throat but now I am not ashamed and consider it a coloraturo addition to the folk world.

It is really no good going around criticising people for producing lovely, if reverberating, noises. There are far worse things they could be doing like not singing at all.

Lets all vibrate with welly.