At that granular level, I'd think the more valuable usage would be for the resorts themselves to perhaps change things like grooming, snow making, signage, or open/close decisions, if there was a problem area.
IMO, I can't see a lot of users/skiers actually wanting/using that granular data in practice, versus having the resort apply it well. (Like "I have to remember to avoid the left side of that one, are the area around that tree on that other run since they've had the most incidents".) Surely there will be some, but I'm not sure the market for that data is that big.
I agree that while a user may not affect change their mind and behavior while already at a single resort, it can change some user decisions when you consider how all resorts have to report would affect things.
But you never know if you have something until you have the data to play it out.
Beyond the single resort, maybe theres some secret sauce why there really are less injuries at 1 resort vs another that only comes out if the numbers are released and analyzed. Maybe the secret sauce is not obvious and not caused by management costcutting either. Even if the injuries are low or in line with other activities, unless the stats are truly zero, one can't claim there is no room for improvement.
more on the positive side, if the data is compared and they see how they stack up, it generates competition for resorts to compete to not be on the bottom.
For those that prefer thinking about it from a noncutthroat and collaborative perspective, maybe those at the top of the list will share or develop the missing practices with those at the bottom to work as an industry team to raise the industry as a whole. Or at least start the research to find out why and what works. Data will set you free.
Back to customer decisioning, Perhaps for example 1 resort has a learners area separated from the other lifts and that somehow affects the injury metrics.
Only those in the know might know this.
So for a new skifamily it may not change their decision to ski, but they may alter the resort they pick to ski based on the metrics or rankings, even if they don't know exactly why its better for beginners. (potentially substitute safer for better if it makes my example smoother).
Same reason why new parents pick a volvo because they top the safety car brand, even though all new cars meet and pass "safety" regulations.
I think we've seen in reality, anytime there is a ranking of anything it does nudge at least a portion of human behavior, even if all the resorts are above the minimum standard bar.
Even the smallest differentiation will affect decision making. Just even here, look at people trying to pick based on metrics the best ski, safest helmet, best google, best resort etc etc.