You seem determined to take issue with the concept of a bidet. That’s OK no one is forcing you to use one. The toilet seat attachment ones are super cheap and convenient. You don’t have to get up and go anywhere. You just turn a knob when you’re done pooping and you get cleaner than you can with paper. Feels good to be clean.

Like back to the arm poop analogy, if you for some reason were getting shit on your arm every single day, sometimes multiple times, then having to go do the shower soap towell thing becomes a hassle. Maybe it makes sense to have a special hose next to where you keep getting shit on you to make clean up easier.

It’s a single wipe on clean skin. Much less paper used. No abraison. No mess. If you got shit on your arm would you be satisfied just wiping if off with paper?

Has it ever been done right though? A capitalist entity’s mandate is to grow itself and extract maximum profit. It is obliged to become as unfettered as possible to achieve that. This is inheritly unsustainable and in conflict with the interests of society and the environment at large.