Here is the original post on the whitewater reddit which is now viral:

https://www.reddit.com/r/whitewater/comments/961ddg/just_going_to_drop_this_here/

Not only does she not assist, after OP rewinds back to the incident, they go back to the aftermath where you will see her ramming her raft and paddles into this guy creating a hazardous situation for everyone there.

I guess you can't ask a woman for help in a life threatening situation these days. That's patriarchy

If you can't handle yourself, you have no business being out there!