4 Year Cycle - why doubt it?

Why do some still doubt the 4 year cycle? It seems to have held for 4 full cycles now. Psychologically, most BTC traders take it as inevitable which makes it a self-fulfilling prophecy. There are always “this time is different” arguments and at some point in the future, hopefully, BTC would mature to a point where there are no cycles, but why bet against the rule until it’s broken?

(Noting this in response to people I’m seeing acting like a 10-15% jump means winter is over. It seems to me that we could not have a sustained rally until Q3 where some will try to front-run the historical Q4 rally. Obviously, DCAing at these levels is still great and who knows how low we’ll actually go this time.)