Nobody considers Strava's training tools 'serious.' It's a social network for training. The premium tools all have better versions on other platforms like Training Peaks, Xert, TrainerRoad etc. that literally every athelete uses instead. No athlete is sharing their training data with their coach on Strava, so given that I think comparisons to entertainment are fair.

>but I can feel a strawman forming

Let's address fallacies as they happen instead of before they do, okay? I find this uncharitable.