I can't speak for adnam but I would consider YC's cannabis-related investments questionable for reasons beyond just "it has to do with pot." If you are going to make your fortune selling pot, IMO you have a moral obligation to assist those (predominantly young men of color) whose lives have been ruined cracking that market for you. Meadow is just another gross Uber-esque intermediary (not to mention the YC partner working as part of the most tough-on-drugs executive branch in decades).
More generally, if you want to establish yourself as a "good person" I think you need to make the argument when you fund the thing as to why your loans aren't predatory, or your pot isn't white people getting rich on the back of black lives, or your laundry service won't leave a community unable to wash their clothes. Part of "doing good" is working with people affected to establish your bona fides. YC doesn't attempt this; they are concerned with "being good" which, as the article covers, is a semantic game that lets you justify any behavior you want.