Perhaps I can clarify the phrase you've picked up,and what I meant.
No,I didn't mean that M's music was 'grotesque or homely'. My phrase wasn't directed to M's music as a whole. I meant ,rather as he said himself ('a symphony should be like the world,containing evrything'), that he included the mushy,the untidy,the ugly,the raucous,the brash etc.etc. in his works. Not just the elegant, joyful - well etc. - hope you get the picture.
And the sources of all those 'warts' are our world and our unconscious, which, like it or not, is part of the world.
So he didn't aim only for precision, confidence, smoothness, perfection, and so on.
He was a 'why not?', rather than a 'why?'
Perhaps that's why there were (still are?) listeners who object to Mahler on the grounds of taste.
Their loss. And anyway, there is taste and there is taste.
Ivor