I'd mainly chalk that up to them being the only ones open to a genuine discussion with him. The articles coming out in the aftermath were all extremely demonizing of Damore.
I remember watching Peterson's interview with him, and Damore didn't really seem comfortable with many of the former's statements, just based on his body language. Maybe that was just social awkwardness.
Also, I don't follow Molyneux or Carlson, but neither Peterson nor Shapiro can be truthfully called extreme.