Do you ever meet people that are kind of a passenger in their own life?

Not sure about acceptance. Most people get angry and resentful for something. It doesn't mean they will analyse the reasons for their frustration. Also sometimes people will not talk to you because they feel like you're a stranger to them but they might talk to people they relate to.

Apathy and equanimity are two different things.

I do feel pain and pleasure, I don't try to avoid them, rather I recognize them. I just don't act on them, I have stopped being a puppet or slave to my feelings.

I guess I'm heading to that direction myself.
Wondering why is probably the same as wondering why some people become alcoholics or drug addicts.
Some things just happen and when they happen it might be a good indicator there's something bad going on.

However, only talking in small talks might simply mean that you're in their "soto", not "uchi" and they don't trust you enough to be open and honest around you.

Honestly it reminds me of me.

I beleive it's in everyone's choice on how to handle life, others don't have to like it or even have to make any sense of it.

Most people accept things as they are most of the time, as it's a waste of time to fight every single battle you see.

Life is short.

Yes and I pass them by. I don't need a boat anchor in my life.

Life happens. We keep moving, no need for drama at every step.

Yep.

A bystander to one's own career, one might say.

Don't u think we are all passengers in our own life?