you do realize they have never called it cheating? so getting technical. nope. never. not once has the words cheating and mnk been put in the same sentence by anyone representing pubg corp, bluehole or Microsoft. and believe me, many have asked, and gone ahead and so for themselves. I can see how you are confused on the subject.
there's no doubt they don't like it. agree with you there. it's unsolicited third party support that improves upon their control mechanic. and making money off it. you know how pubg corp feels third parties and their ip. anyway that's besides the point: Input methods are not cheating. I do think depending on the game, specific type of input are better than others. pubg being one of those cases. but in no way are emulators giving the mythical pc mouse and keyboard advantage. if they were, I'd be on your side of it. as is these devices play by the rules set by the devs. they don't not change any of the rules. I could explanation this part more but I believe someone else already did and you should know this by now anyway.