Technically, there are two different fouls. Roughing the kicker and running into the kicker. I agree about the one call where Gardocki got clipped, it should have been running into the kicker, and they didn’t call it.
Also, the reason for no penalty against Walker for excessive celebration is 1) It was not choreographed (pens in socks, dance routine with mascot, etc…) and 2) It did not involve any other players. It was only him dancing, therefore it was legal.
I’m not conding the excessive celebration rules, I’m just telling everyone what they are, basically verbatim, from the NFL rulebook