Still, even with the suspicions that will always exist in this sport, that type of evolution in results over time which is said to be due to better training, better material etc. is seen in most sports, so why wouldn't it be just as true in cycling?
Or perhaps the answer is simply that all other sports are just as crooked and the reason Mondo Duplantis keeps breaking the pole vault record multiple times per year is simply due to better doping.
Evolution is to be expected, yet some world records from very dark doping times are still intact, or lasted forever before being overtaken by supposedly cleaner, yet more modern athletes.
But it's not even evolution we've seen. The increase compared to partly the same riders before 2020 is to big, the step from last year to this is just insane. Also we know they are not just beating times from the heydays of EPO, but they are beating them by minutes.
There is also the question of just how much evolution can be expected in human beings, and how much can be optimised by science. Our basic physiological makeup isn't just changing, and especially not just because some sports are getting more professional.
Duplantis I guess is a more complicated matter, because it's a very technical sport, but I am sure strength and speed plays a role in it as well, Duplantis recently won some sort of sprint dual agaist a very fast hurdles guy I forgot the name of.
Of course evolution in methods, knowledge, possibilities is always going to have an impact, but the explanation still has a historically bad track record when it comes to smoke screens to obscure the view on doping related results.