My exact same experience after having visited the Philippines. I got the washlet-style bidet that attaches to the toilet seat area, and as the other reply to your comment suggests, I have a portable bidet as well, as a backup. Bidets are unquestionably the best thing since breathable air.
And yes, if I have to scrape, it feels horrible. Like casually reaching into a septic tank and swirling an arm around.
Sewage pits get their name from the one thing they usually contain: sewage. Sure, one can try to distinguish between the ingredients, but most people just want that shit gone.