Why not? Average ping players don't get the privilege to kick with a shield without risk.
Something that should actually be punishable in tournaments is that teleport to horse glitch
It's not a glitch because it's not code or mechanic malfuntioning, it's just the block happening in a moment where it's not supposed to happen because of high ping, its like not blocking when you do block in your screen on servers when you have really high ping, your block just doesn't get registered in time even if you see it active in your screen, not a glitch aswell
And yeah, Horse mount tp is controllable and whoever uses it does is actually abusing a mechanic which doesn't involve network flaws. Agreed.
Edit: As you pointed out it's just something that they never really cared to finetune or workaround, but it's just impossible to prevent people from kicking and trying to block as early as possible, you basicly would ban 50+ ping ppl from kicking at all.