The pedal drains your run energy so you would need a ton of super energies to train there and it wouldn't be very afk either. The pump requires someone to shovel coke but there's usually a world going with someone doing that, some people pump to train their 10 HP accounts
i feel like the problem with osrs, is that it's not the most interactive game most of the time, so we fall into a tendency just to afk it for the sake of it