Lawyer: You must include my unenforceable EULA.
Anyone-with-a-brain: lol, no. Your "contribution" to this project only serves to do the direct opposite of our stated intent... Actually, why are you involving yourself here - are you billing for this?
Lawyer scampering noises recede into the distance
In-house counsel is a little different but again even at places like IBM the lawyers could not get away with blocking meaningful business
The minimum liability comes from doing nothing, so the default advice is "Don't."
You must be working in a very unregulated industry if that’s true!
"How do I not get sued for my new medical device?"
"Don't sell it to anybody."
More likely in your scenario is:
Lawyer: You must include this EULA that this person/board/committee demands, and will fire both of us if you don't, because they asked me how to cover their asses in case of XYZ.
Anyone-with-a-brain: okay.
Lawyers themselves are certainly powerful, but they only really derive power from people with real power; states, boards of directors, judges, etc.