Pretty sure its just a product of the times. I mean in the 90s in Ranma you had this old man that full on groped and stripped Ranma and stole girls underwear and avoided repercussions in general and it was used as humor. This seems to be toned down from that and this came out about 10 years ago.
oh my god, happosai was my number 1 least favorite
tbh when he was introduced, was when I feel like the manga forgot it was supposed to have a plot too