Although accuracy is perhaps needed, like when dealing with ARBITRARY objects, like objects, points, curves, edges aligned on top of each other...

I dont ALWAYS bother to use, say "point-to-curve-snap" accuracy, when making things.

I just zoom in good and move the parts as close to each other as i can in the viewport.

Um... im trying to say that accuracy isnt always an issue for me.

But when things have to snap, they have to snap.