Well, Indians have learned this technology from abroad--mostly Middle East, thats where many Indians work. Of course, now Indian companies make those sprayer bidets.

People have been using water to clean themselves for hundreds if not thousands of years.

Squat toils + bidet attachment is better than squat toilet and a jug for water. No dispute about that. Sit down toilet + hand held bidet attachment is worse than sit down toilet + bidet inside in the toilet without using hand. My answer was about sit down toilet with hand held bidet attachments; how Indians discovered these hand held bidet attachments.