i don't like the kind of people whose tactic in promoting a certain thing, idea, technology, etc. is to only talk about its benefits and never admit to its drawbacks
like, i think this is intellectually dishonest, and also impractical, as once the person you're approaching sees the negatives of whatever you're proposing, they'll instead think "oh no, i was tricked, it was foolish to trust these people"
i remember a looong time ago i used to argue on a small blog against an admin who refused to understand that and thought the best way to convince people to switch to linux is to just tell how awesome it is and not mention that even if there aren't any hardware problems, switching to a new OS will require at the very least getting used to a new user interface, the new customs of how things work, etc., not all of them could be perceived as "for the better", and the admin in question started to perceive me as an enemy for that
in fact, i think that this kind of intellectual dishonesty is also why politics is so terrible
no politician or party wants to say "we don't have the solution to these specific problems" or "our solution may not fit everyone equally well", even though finding a suitable compromise that respects people's rights and interests as much as possible is a fundamental mechanic of democracy