Even though it is a bad idea, the time to try to grind the tile edges to a bullnose profile would have been BEFORE they are glued down, proper access now is difficult, and all the debris will end up in the carpet or under the pad.
Plus you might damage or chip a tile, and then will need to remove and replace it, which is not fun.
And if I had been talked into attempting this goofy grinding, I would have sealed the exposed edges, while they were in my hand, which will now be extremely messy and difficult with them butted up to the carpet.
The installer should have installed a transition piece or trim edge, or at least brought up the subject with the client before leaving it like this.
And the tiles might be installed too high, relative to the carpet.
It is common to not need a transition, if the carpet sits a little higher than the tile, which then masks the abrupt 90 degree tile edge.
The tackless strips and padding should raise the tile enough to do that.
So the tile might have been laid over existing flooring, or it was too thick, or whatever.
Just my opinion, feel free to ignore.