This is what happens when you take the move fast and break things culture to anything where people die when things break. Really just sad and so stupid.
It’s a tragedy, but high risk activities are by definition going to have a few.
And if you tried to take paid passengers on a homebuilt uncertified aircraft today you would go to jail. This isn't the early days. The challenger deep was reached over 60 years ago. We've been building submarines longer than airplanes. We know how to do this stuff safely. This was negligence.
Or then you take things slow and you end up like NASA who has not launched any new rocket in years. Is that better?
Science, discovery, boldly going where no one has gone before? Absolutely safety is going to be somewhat compromised. Taking rich people to the gawk at the Titanic? I, personally, think you're a bit of dick for MacGyvering a vessel together and calling it good enough.