In Short:

Both clean with water instead of paper.
The difference isn't the goal, but the effort, the space required, and everyday use.

Why We Think It's Normal:

Paper is habit. Around here, water is still seen as “extra.”
Yet most people already think: clean is clean – no matter how you get there. We just don't talk about it.

The Honest Explanation:

A fixed bidet is a separate sanitary basin. It needs space, plumbing connections, and planning. It stays wherever it was installed.
A butt shower is a simple tool: water, targeted, direct. No extra basin, no renovations. Functional rather than for show.

Both clean with water. Neither one makes you a better person.
The difference is how much infrastructure you're willing to accept in order to be clean.

Is That True?

A bidet cleans more thoroughly.
No. Water cleans. The shape of the basin changes little about that.

Butt showers are only for travel.
No. They're mostly for people who don't want a renovation.

A fixed bidet is more hygienic.
Not automatically. Hygiene depends on how you use it, not on the price of the ceramic.

Butt showers are improvised.
Only if you confuse cleanliness with luxury.

Where We Stand:

We find it strange to tie cleanliness to the size of your bathroom.
If water helps, it doesn't matter whether it comes from a basin or a shower.

A Gentle Next Step:

Don't ask yourself what's “right.”
Ask yourself what's realistic in your everyday life.