Slight problem with that..
Routes are either workouts or existing commutes, ie, where riders have to go to get to work already, rather than a preferred shorter route.
Workouts are what's comfortable for a user in a loop so kinda irrelevant, commutes don't take into account what would be more direct routes but have to be avoided due to either being a car park (and therefore not fun to cycle down) or existing infrastructure blocking the way.
For example I live in Sydney's inner west and my office is on the North Shore which entails a commute through the City Centre. There's a nice long street I used to take before it was closed to road traffic in favour of a tram, so now I have to loop out of my way to cycle safely and legally (and that's in both directions). That's one example of many diversions I have to take over a more direct route for safety or legal reasons that if you were looking to fit a cycle lane would be obvious from staring at the map, however, Strava data is going to tell another story with many other cyclists taking similar diversions to myself.
Consultation with local commuters would be a better first step and they could be reached by local cycling advocacy groups (such as here with have BicycleNSW who will have lots of contact details through being an advocacy group and also offering insurance).
Also, what about those who have "kom's" that break the world bicycle land speed record, by several factors, not that I'm inferring they've cheated and it's complete bumk data, but..