@clearstream, you asked if it is "okay for posters to disfavour mechanics out of moral concerns" and did so in a fashion that suggests you believe that a moral concern is equivalent to a simple difference in taste where there is no moral component.
I responded to say that forming an opinion on a mechanic is based on moral concerns is, by definition, making moral judgements and thus it is something you should do carefully (especially if you want to voice the opinion that it's a matter of morality). I also indicated that I don't believe that moral judgements should be treated the same way as individual preferences with no meaningful moral component.
You've then written a huge post pointing out that it's possible to dislike a mechanic for reasons of personal preference that aren't based on morality, but I have no idea what the relevance of all this is, as I was specifically and only responding to your question about the validity of moral concerns.
@AlViking disfavours minion mechanics on grounds that matter to them, and they have said that they do not impose that on others. I can disfavour minion mechanics on other grounds without imposing that on others. There is nothing untoward about either of us explaining our grounds just in case others find on reflection they share them.
When you state that your grounds for disliking a mechanic are moral concerns, you are not merely sharing a preference. You are also suggesting that people who do not share your concerns, and who use the morally concerning mechanic, are behaving immorally.
Edit: If you genuinely believe it is morally questionable to use a given mechanic, then by all means stick to your guns. But if you do actually believe it's a moral issue, don't pretend that it's just a preference like any other or act surprised when those who disagree with you do so strongly.
It's also worth keeping in mind that people preaching moral issues with gaming have a proud tradition going all the way back to the Satanic Panic, BADD and Chick in the 80s, through to Collective Shout currently, all claiming to be protecting us from violence, degeneracy and Satan, so you are going to face a lot of skepticism unless you have some really compelling arguments.