The Sincerest Form of Flattery.
Someone told me that the Pet Shop Boys version of Brenda Lee's* "You Are Always on my Mind" was, and I'm quoting, "a sonic abortion, a crime against music that should never have been committed." I felt similar things about Madonna's version of "American Pie," and a number of other cover tunes. Plenty of really erudite people said such things about The Wind Done Gone."
This is fundamentally bad thinking.
No matter your opinion of a given artist or their medium, nothing should be off limits. Artistically, everything should be permitted. This is not to comment on the ultimate quality of the work; some of these remakes are just plain shitty, but that doesn't mean that there isn't value in creating them. To make such evaluations is tantamount to believing in objective taste, which is pretty foolish when you think about it.
What's interesting to me is that these feelings appear oddly specific to music and movies. When someone makes a parody of the Mona Lisa or re-interprets Shakespeare, we don't get all wibbly about it, but every cover of a song more than fifteen years old meets nothing but derision from critics. Why is "Stairway to Heaven" untouchable but we can rework Romeo & Juliet with impunity?
Nothing is sacred in this regard and we need to get over it.
*The version that you know is probably Elvis Presley's from 1972 or Willie Nelson's from 1982.