> Now I just slide them on and off still tied.

Normally a good way to ruin the back of the collar though, especially if they have achilles support structures (like some running shoes.)

Source: many of my shoes with ruined collars.

This is certainly true of shoes with those plastic inserts around the back. I mostly wear casual shoes, specifically the Adidas gazelles which do not have anything rigid on the back and have a low friction leather outside which makes slipping them on easy.

Shoehorn helps with that.

But this doesn't work if you like he shoes to fit tightly and not wiggle around while walking, right?

They are sufficiently tight for me, no wiggle. It does depend on the shoe though. With some its very easy and some its hard and risks damaging the back.