I think its more a matter of frieza being created before any idea of Beerus was about and the author making up shit as they went.xD To a certain extent yea, but planet destroying isn't enough to get their attention I'd say, otherwise Frieza wouldn't have existed in DBZ. I think it takes a universe ending threat at least xD Frieza actually wanted to rule it all. Buu, and Cell? yea eventually they'd probably be stopped by Beerus if Goku and Co hadn't stopped em.
King Yemma and the Kai's are basically gods at the namek point of the story and king Kai is shit scared of Frieza, if they could call up Beerus and beg for him to make a difference then king Kai probably would have (unless asking a destroyer for help is to dangerous/scary)
Buu fought the Kai's and absorbed or killed them, which should have been worthy of a destroyer God coming down to fix it. Like if Buu killed every Kai including the youngest one then Beerus dies in his sleep not knowing why.
I like dbz alot but its so easy to poke holes at if you take all of it as a whole