How common is it for Americans to use the setup in pic related for their bathrooms?

Motherfucker, I've never seen/used a poop scoop in my entire life!

why dont u just not use any drain cleaner? i mean fuck it lmao no ones gonna know

What the hell? What does your backwards ass country do then? Just flush whole turds? You realize that goes to the water system and they can't clean a whole turd, right? Your whole country basically drinks poop water. That's nasty.

These are used in a lot of the older places in Richmond, VA. the piping is old i assume so you have to scoop out the poop.

I have them where I live. The piping and sewerage systems are old, so as a bit of a safeguard solid wastes (poo's) are scooped and placed in the bin rather than flushed. They can be flushed, however as pipes age and degrade the odds of having a blockage downstream isn't worth the inconvinence of taking your solid waste and placing it in a bin. Much like how tampons or soft wipes should not be flushed.

>imagine not installing a insinkerator garbage disposal in line with your toilet instead.

That's fucked. I'd rather shit strate into the garbage can, what's the point of the toilet even?

How cheap. Americas infrastructure is definitely going downhill and rather than fix it they slap a rubberband. Huh what are all those taxes for!?

For some reason here in Tennessee, those are only allowed on below grade toilets (flush upwards to the sewer via pressure assist).

You can still flush it but it has the chance of adverse effects downstream. As a rule of thumb I do not expect visitors in my house to use the ladle, and likewise when I am at someone elses house. But in my own home I do it to minimise chances of blockages downstream. It really isn't that much trouble.