I don't even think you realize you just provided an example of why Canon is not going to be fine. Canon destroyed Nikon on the sidelines and never lost its lead from them. Now Sony TOOK Nikon's spot at #2 and has been gaining share from Canon - based exclusively on ILC sales. So I'm here waiving a red flag to draw attention to Canon losing out on some younger photographers that aspire to be professionals because they can't afford Canon RF lenses.
Do you really think Canon doesn't observe any aspects of the market ?
They are fighting against Sony to have the first place for mirrorless market, but Canon still has about a half of the global market.
So I don't think it's time to panic !
However Sony works hard to enter professionnal photo market (photo agencies, and TV channels for video) and they succeed ! I think their prices are very well studied to cut Canon's legs, the priority is at now to grow market shares and not making a lot of profit at the moment... but in the future, when the "trap" is closed !
I don't think buying Canon is a trap for anyone. Everybody knows, when buying a Canon body, the truth about the lens offer at T-time, the prices, and the performances ! Everybody is free to accept or not.
I personnally don't like Sony bodies because of "philosophy", ergonomics... but I admit their lens offer is good. However it's not because a couple of Canon customers need a RF 40 that doesn't exists, that no one can shoot Canon with the present lens offer ! Ok, many of the RF lenses are expensive, but Sony ones are too ! The price argument for Sony is only based on the fact that third party lens manufacturers exist, not because Sony propose cheap lenses !
When I look back in the DSLR years, I've heard very often that Canon users didn't want to use third-party lenses (Sigma or Tamron), because there often were bugs. Maybe it's not really different nowadays.
For Sony, having the third-party lenses is great for customers, but not for Sony : ok they sell bodies, but do they really sell enough Sony lenses ? Maybe not !
Sony didn't have any other solution to enter market at the begining, they needed a large lenses offer, so they opened their mount to third-parties. Now Sony has a large optical offer, but I don't think they sell so much Sony lenses as they want. Sony bodies are not cheap too, the only advantage is that Sigma exists !