That‘s nonsense - sorry. The heart rare monitor of the Apple watch is quite nice - and for professional sport you would rather wear a Garmin. But why not use the data that is available? The same is true if you wear your Garmin or AW for running - or do you want to say that the functionality of AW is crap? - and if, why are you wearing an ultra to collect data?Oh - and further to your HR comment…nobody riding with a decent head unit is getting HR from their watch. They’re wearing a strap. The wrist is a bad place for measurement on the bike.
So you don‘t have a point here. You just want to say anything to defend Apple - but there is nothing to defend. With the old think different and just works approach of Apple, you just would hold your AW to your cycle computer or the gym equipment and it would - just work.
By the way, it works with every Android or Garmin watch.