I’m surprised how many are attracted to this. When Fitbit offered premium services with live coaches etc for their devices, plenty around these forums derided the idea. “Who would pay a subscription?”
I don’t think this will be that compelling ultimately; within a few days 99% of the videos will be on YouTube and people will be able to follow along (without any Apple device) and those that do end up paying will soon realise it‘s $10 a month to see your watch stats on your TV.
It gives people the hope that they will get fit and look ripped. Apple gladly takes $10 for providing that hope. But the whole fitness business is like this, secondary and tertiary additions in form of supplements, clothes etc is what makes money.