ANSWER: Because they’re not asking about training with only performance in mind. They’re asking about training while also having fun. Conflating the two is just confirmation bias.
@Scott Semple, I agree and disagree with the above. I went for a 2 mile run at about a pace of 12-minute miles. When I was done My knees were so sore that I could walk upstairs. So in my case, cycling is a great way for me to push my endurance, cardio, and get that volume w/ still being functional the next day. Saturday I did a 62-mile ride and felt great during and after. Which makes the 2-mile run sidelining me is frustrating.
I really appreciate this discussion and all the ideas being discussed. Thanks for being great at sharing.
I will be looking to transition to trail running this fall hopefully I’ll be able to figure it out w/o the pain.