As I recall, it was Pavarotti himself who said this in an interview. He then proceeded to let out a scream that left the poor interviewer half deaf.
He had a point too: sound amplification is a relatively recent invention, and as concert halls and orchestras became ever larger, opera singers needed ever louder singing to be heard at all.
The excessive vibrato is one reason why I am often turned off by classical singing. With some pieces and singers, it sounds to me like they are completely off key half the time, or they vibrate so much that it is not clear to me which note they are singing. I also detest a great deal of virtuoso singing: once again, few singers can manage to stay on the note, or so it sounds to me.
I very much prefer styles and singers where vibrato is almost, or even completely, absent. And where excessive demands are not made on the voice - if you want scales of 64th notes running up and down three octaves, use a frickin' violin, for heaven's sake.