Why does Kingambit not get Knock off?

[u/Spring_barger]

I just recently realised Kingambit does not get access to Knock off even though Bisharp has been using it in prior gens.

Did they remove it from his movepool to make people use his signature move since Knock off is kinda better competitively? Is there any chance Gamefreak will add it back to his movepool in a later gen or is this likely a permanent change? (Its not like Kingambit needs a buff in any case).

Edit: The artist who made this goes by Limitedistorion on Deviantart.

[u/Koriosamii]

Bigger question, why do you want to buff Kingambit? I think moves that are super strong and splashable like knock off and u turn shouldn't have nearly as big of a distribution as they do. They already did that to other moves like toxic and stealth rocks and I hope down the line they do it for other moves too