I understand that it can be disgusting for some, but checking cats' toilets regularly helps to detect health problems early. That's why it's better for them to defecate in the litter box instead of in a place where we can't check.
Discussion
You can still check in an asian style toilet. The toilet doesn't flush itself but I understand what you mean since in a litter box when cleaning your nose is 1 or 2 feet away. It's a tough job but billions of people do it every day.