Do you think the words
"action camera" are magical or something? That by merely uttering them your bald assertion becomes a fact?
Would Canon build a lower tier camera that is equal to or better than a previous higher tier camera for a particular category of photography? The answer is that
they have in response to market conditions, and if the market dictates it
they will do so again. They respond to the market, not to your personal
"woe is me, the sky is falling!" narrative. Just off the top of my head the 5D series took over studio/landscape from the 1Ds series. Go back to the film days and for a full year and a half the EOS 3 blew away the EOS 1 series
for action photography. And if we get down to it, the 7D2 itself is practically a 1D IV at a far lower price point. The very camera you're crying about is itself an example of Canon doing something you claim they would never do!