Traffic (lights) within the city are the main problem, not stops.

And the Finnair bus route is much worse for transfering to the metro.

Technically, you could use them at the vending machine, hmm, when it worked anyway.

I have a zone 2 commuter subscription so the local buses and trains cost me effectively zero (extra)

Well, it might have been nice for visitors going to central hotels. For locals, it is more expensive and less convenient than the local buses.

With the train, I think it's rendered mostly useless.