Wtf Is this excursion fee?

I went to Civic center, Bart was running late so I went outside for a cigarette, came back, and the clip card didn't work anymore.

I got to bitch back and forth at at the station for a bit and eventually they let me in,

Turns out they have an excursion fee and it's like $7 just for entering and leaving the station.

And they have no bathrooms, nothing. If your train is running late you just have to sit and wait

Why am I not surprised people are s***** on their trains?