There are people who always have super solid movements that don't leave a trail. Many of us have a variety of textures that smear as they exit.

I get that, but my experience has been that even greasy, sticky shits get properly washed off my bum so long as I use a decent bidet and know how to use it properly. I haven't found an instance where a bidet has been insufficient and I don't mean to belittle anyone, but there is a bit of a learning curve and perhaps it was a lack of experience or the lack of quality equipment?

Poops that would leave me wiping 20x and with a sore, bleeding asshole while wiping are not an issue with a wash. I guess someone's poop could be very different from mine, but I haven't run into such an issue after using one for years unless I just didn't wash properly.

A bidet removes the majority of it but never all, and wiping reveals what is left behind.

This can absolutely be true, but it's an indication of improper washing and the need for a repeat or a better bidet.