I agree that as far as anti-women jokes go, it was on the innocuous, inane side.  But this is the important point, isn't it:

"Mr. Bonderman chose to blurt out this bon mot at this particular meeting. In the face of multiple sexual-harassment claims and a series of scandals, the meeting had been called to discuss Uber’s corporate culture of creepiness."

The Uber Board was trying to figure out what to do about sexual-harassment at Uber, if for nothing else, because it was costing them big money.  I think it's safe to say Bonderman wasn't exactly the right guy for the job.