It's time to separate Live Play from Pro Play
There was a valid argument for not doing so before: "We don't want people to be watching pro play and thinking, "Oh wow, these guys are really good at a completely different game than from what I play", we want them to feel like they can attain what they're seeing".
Ironically, not only do people not want to attain what they're seeing, but tons of people aren't even seeing it anymore. People are looking at pro play right now (key word looking, NOT watching) and thinking "Oh no, the pros started playing my champion regularly even though he's not that great in solo queue. I can't WAIT for my champion to get nerfed at no fault of its own." People used to get excited when they saw their main in pro play! I know I freaked out when Sion had his day (when he was first reworked, not when he was played as a poke bot...)
There is no good reason to have pros be on the same patch cycle as live players anymore. All it does is frustrate live players (especially when you do something like Nerf Sejuani just to try and control the Worlds meta. Oh man, I bet that stings for all of the Sej mains who were DOING NOTHING WRONG IN SOLO QUEUE.) and stress them out with thoughts of "Oh god, who's next on the nerfing block? Rek'sai? WHY, I struggle to win with her enough as it is!"
Just stop.