A surprising answer in many respects! First of all your general comparison of Bolet's tone to dung?
Secondly, surely the path towards finding a personal sound will at some point involve imitating another person's, or at least imagining that you are imitating that person's.
Well, I like surprises and sometimes even surprise myself

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First, hopefully nobody would read into my message as if I compared Bolet's tone to a poop

. It was rather general metaphoric way of saying (paraphrasing Horowitz) "It is better to make your own mistakes, rather than copying others".
I would never compare his tone to dung, although Bolet is not my absolutely favorite pianist ever, but I deeply respect him and when at his best, I like his playing a lot. But that's not the point here.
In fact, I completely agree with the statement about imitating another person. I myself did it many times and it taught me understanding music, piano, and technique in the most helpful way.
The difference is that "another person" for some misterious reason has always played "wrong" instrument.
It was my favorite cello, which I still adore to imitate on piano, for its incredible depth of sound and emotions.
It was real passion of my life--singing, which taught me how to phrase and shape music, use breathing and... just to sing or pronounce music.
It was opera, which taught me about theatrical context of music.
It was orchestra, which taught me about possibilities of alternating Tutti and different groups of instruments.
It was conductors, which taught me about how to breath with hands and put phrases into pianistical motions.
It was violin, clarinet, tuba, and hundreds other instruments which taught me about piano more than any pianist could possibly do.
For some reason I just never felt interest in imitating sound of other pianists, but maybe that's just me...