The right answer is to work to reduce them.
How do you know that PADI isn't continuing to work on how to reduce such tragedies? My understanding is that they've already made some changes in their program, based upon statements I've read in this thread. I'm specifically referring to Hawkwood's post/response to The Laconic on page 12 of this thread:
When I first started diving, I tried to read a lot of incident reports. For me, the single most important lesson I learned was to at least bear in mind the possibility of dropping weights when you're in trouble, and to always drop weights when you're in trouble at the surface (no exceptions come to mind, anyway). But this was never emphasized in my open water course. And later, while I was a DMC, I was (mildly) reprimanded by the instructor for even bringing it up during an OW classroom session.
Well, it's now a requirement in PADI's revised OW program.
I have a tough time thinking that PADI (or any other training agency) will not make ongoing changes to increase the safety of all their programs. I don't mean to be facetious when I say this, but all training agencies have a financial interest in their students surviving. Even if one considers any training agency to be evil and have no moral compass, there is always the financial interests, including, but not limited to: avoiding lawsuits, staying alive to take more classes, staying alive and getting friends/family to dive.
Now I'm not a professional diver. Yet. I'll start that journey in the new year with the dive shop with the most thorough diving instructor I've had (and I've had about a dozen so far).