Exactly this is what I was trying to explain in the extremely long post. If you aware of the needs of the users, and if you know the business environment, you can conscientiously decide your strategic direction, and steer your product to that direction. You may say that you target those people who run at most 5k, and prefer listening to the music, and consequently you will spend little time to develop analytical features, but you will focus on marketing and spend your budget to that. Or, you may target ultra runners, which requires a way different approach in selecting the right features and marketing strategy.
I truly believe, that if you are a product manager, you must be able to produce an analysis like this (well, a analysis based on actual data) in order to be able to make conscientious, as opposed to gut feeling-based, decisions.