I thought only subjective penalties weren't reviewable. Like pass interference, either way, and holding.
Illegal shift is a black and white penalty.
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No penalties are reviewable in the NFL. There was 1 year that the league allowed a challenge on Pass Interference calls (a challenge)... and that was thrown out at the end of that season. Carton knows the NFL rules and he was shocked to hear that the NFL wasn't following their own rules.
That was the point Carton was making and he is absolutely correct. Clearly it went over many people's heads though. It appears as though some people hate this man so much that they allow the hate to blind themselves.
It's not a good look, and it also shows ignorance when you call someone out for not knowing the rules... when in fact... they actually DO KNOW the rules and presented it correctly. Poor form on your part at minimum.