That's entirely on you for being so negative and defensive by default. I don't see this as that at all, I see it as an image made by someone who's sick of seeing people in the fandom literally screaming at each other over dumbass reasons like why Luna is or isn't "better" than Celestia in some way, or the constant "starlight is the best/worst thing ever and fuck you for thinking otherwise" dribble. Having opinions is one thing, liking or disliking a character is completely fine, but it's annoying as hell to see how weirdly hostile people can be towards each other in this fandom over the endorsement of a certain character by some random person and I think that's what the OP is touching on. Basically, it says chill out, not "you're not allowed to have negative opinions". It just means don't be a dick.