I would just point out that luck counts in favor of the system, not against it.
Yes, people risk their capital against luck. They bet on questionable investments. Is this R&D on solar cells going to pay off? Are we going to be able to build this wind farm? Well, we put our cash on the line and we hope fortune favors us.
Yes, a lot of that does come down to luck, but we want people to be betting on these efforts that end up helping humanity.
Just because there’s luck involved doesn’t mean the effort isn’t worthwhile. It’s even more reason that we should applaud the people who put their own money toward these risky efforts.
The billionaire got lucky. That just means he risked his resources on an effort that ended up succeeding and helping others.