This is not an accurate statement (sorry).

When the trigger mechanism in the frame has to interact with the firing system in the slide, the sloppy fit of a slide may negatively impact trigger feel, slide accuracy and even function.

While I doubt that an average manufactured gun that is in spec (which can be rather broad) will fail common accuracy or reliability functions, a gun with tighter and more consistently mated components once polished to its best tolerance will be both reliable and accurate.

The information missing from the OP’s post is whether he believes the sloppy slide fit negatively affects his gun? Probably not.