As an Australian, I should note that the reason positive cases were in the low hundreds — actually, low tens most of the time — was precisely because of the lockdowns. Once people stopped obeying the lockdowns, positive cases started rising, and we ended up with the current situation here in Sydney with ~1500 cases per day. The only reason it’s not any higher is because (a) we still have lockdown in place, and most people comply, and (b) we’re rapidly getting vaccinated as I type.

(And also, the lockdowns weren’t continuous by any measure. Lockdown restrictions were consistently relaxed as soon as cases dropped to single digits.)