"Bean" is a weak man that takes the easiest path. He does a lot of posturing, and has a ruined arm because of NCR torture. He runs a still, which annoys Porter who he tells is just for Molotov cocktails, but he drinks a lot to numb the pain of his arm. Hardin has convinced him into leaving Denver because there's nothing left there.
J.J. Morehouse used to arrange for thugs, including Bean, Scoby, and Slow Joe, to disable track, then blame it on raiders and tribals. That way he could demand more materials and demand that Dodge pay them more at the same time.
Design document notes on the quest Analyze Their Drug Stockpile mentions helping Bean to up the liquor content of his still, which has the knock on effect of being able to make better Molotov cocktails.