If you play close attention to the "power' of your toilets flush... you'll notice when it's getting close to a clog. That flush will make you second guess something isn't right. And if your neglect it, you will sooner or later realize it was in fact on its way to clog.
The life of a homeowner. You guys have NO idea the amount of chit you need to learn and pay attention to on a daily basis to make sure your home is well maintained. Adulting fkin sucks.
Yeah, toilets in American homes tend to rely on a siphon to evacuate the bowl so the outlet has to be narrower. Also, Bidets are not very common so most people [insufficiently] clean themselves with toilet paper which is prone to causing clogs.
Personally, I installed a bidet a few years ago and I would never go back to not having one.
I live in Europe, and somehow my toilet gets blocked every couple of months. Might have to just clean it properly with a spiral, but so far the plunger has always worked.
Just don't be too aggressive. There will be backsplash.
You went to a country with incredibly poor-quality, high fibre ultra-processed food, coupled with medieval-level plumbing, then clogged a toilet and said -
The figure is somewhere above 0%, but certainly not zero. For example, haven't you seen the crap blaster 9000 infomercial at 2AM on a Tuesday? You connect that bad boy to a fire hydrant (vendor liability disclaimed), pull the turbo-diesel engine rip cord, and wear a full body bio-hazard suit with air supply (suggested). Not for use with some sets. Batteries not included.
You only make this mistake once, hopefully. The first night I moved into my new place, many years ago was a bad night. My stuff didn't show up yet. It was getting delivered in a few days. I didn't even take a big dump. It just clogged up. I had to get an emergency plunger and since that move I make sure there is one close by during moves.