Does the same logic apply to speed limits? Fire code violations?
I think this is an application of the all or nothing fallacy. Either we entirely stop something or we shouldn't try.
Risk = likelihood x impact
Risk reduction generally demands we address both.
More could be done to minimize the likelihood of such occurrences. Collectively, we might not want to live within the systems that might help minimize the frequency of these events. Or we may not want to see them funded.
But I think it's overstating it to claim that nothing can be done. Imagination, political will, & funding are needed, but there is plenty that could be done.
There are a lot of things that could be done, most unpleasant to some degree. “Dump your gear out” stations at the trailhead so a Ranger can check that you have weather-appropriate gear. A short quiz to see if you know the most basic steps to take in an emergency. Mandatory hiker insurance that can be purchased by the day at the trailhead.