When I was a kid I had a classic playstation (PS1) it had multiple kinds of video outputs, one of which was S-video, which was a lot sharper than composite, problem was sharper wasn't better, it made pixel games have sharp edged pixels and the blur and scanlines that blended were missing, it also made the motions of 3D things just look clunky and disconnected. In almost every way possible the higher resolution output made it look worse.

So yeah, making a movie sharper could very likely make it worse.