Tragic, my point is that in footy there is a pretty commonly understood meaning to 'bump' as an action. You are are, or at least were, taught how to bump. The dictionary definition the word bump means the same as collision. In footy they mean different things, and the AFL has codified them differently. To use your dictionary definition of 'a sudden forceful blow, impact, or jolt' could apply to someone putting their knee into someone's back in a marking contest. That is not a bump, despite it meeting your preferred definition.
There is an element of risk when you play any sport, including - and perhaps especially - AFL. If you say only the consequences matter, regardless of whether a player was trying to win the ball is just a nonsense. Genuine and reasonable attempts to win the ball have to be protected, otherwise you might as well pack the whole thing up.
Now, you might argue that Maynard's attempt to win the ball was reckless or careless (or if your Raggy that it was just a ruse to take our Brayshaw), but as of 2023 that's not what the rules say. The AFL has to be very careful about outlawing genuine attempts to win the footy. It seems trite to even say that.
Webster's hit was just an awful act that's been been highlighted and legislated out of the game for ages. Everyone agrees. But I don't think you can say 'well, if you're outraged about that why aren't you outraged about Maynard' without expecting some pushback.
You're trying to create this view that unless you think all head-high contact sees players rubbed out for months then you don't care about player welfare. I don't think that sort of rhetoric serves anyone.
The AFL is rightly focusing on the biggest causes of concussion, starting with bumps (the action not the consequence), then late spoils, then dangerous tackles. Spoils are a blip on the radar. The real question is marking contests. Are we going to see players who genuinely attempt marks that lead to concussion rubbed out. Isn't a concussion a foreseeable result of two players running for the same ball, let alone a knee in the back of the head?