I think you'll find that with most Perth sporting teams (West Coast, Fremantle, Scorchers, Wildcats, Fever) already on Fox/Kayo, if people in Perth/WA wanted Fox/Kayo, they'd already have it
I know one thing the AFL do well is having their teams on FTA. I’m sure somebody who lives there (PR for example) can confirm it but if we get the fumbleball on FTA in NSW then they definitely would or should. Most Big Bash games are also on FTA
You would be right about the basketball though. Don’t know about the netball.