I don't think that comparison holds. What Apple is doing is making a crucial rescue tool, the distress beacon, near-ubiquitous. In a few years, any major-ish emergency involving people rich enough to own iPhones will have a working distress beacon around. This isn't like an InReach that you get and subscribe because you expect you might end up in an emergency, this is something that'll be around without even an awareness of danger and the optics of letting that potential go to waste carry a cost as well. Imagine a plane goes down in a remote area, a dozen iPhones on board but no one got the subscription. They might even end up eating the costs for genuine distress calls just for the marketing value of the iPhone saving hundreds of lives a year, or they might just charge a large sum for non-subscription distress calls and eat the cost in case the bear got there first.
Besides, if they included a few tweet-sized non-emergency text messages and location updates a day in a reasonably priced subscription, I bet that would sell like hotcakes in outdoorsy circles. People bring their phone anyway, so 2-3 iPhones on your party might make the InReach redundant. I'd love that.