I don't think the parent was saying that you shouldn't take over a subreddit in response to moderator behavior. The thread has been saying two seperate things: that you shouldn't try to take over a subreddit for how its users behave, and that inappropriate moderator behavior is a problem on reddit. If you can convince a subreddit's subscribers that the moderators are shit and you'd do a better job, then you should certainly take control of the subreddit.

Usually it's easier to just make a new subreddit and convince people that yours is better.