[adventured]

> few people's inventions are really that valuable

The problem is, now you're stepping into quantifying the context on heavily subjective terms. Here's how that goes then:

How valuable have most of the last 15 billion people been on average? How about the bottom 50% of those people in terms of productivity and what they contributed to the betterment (subjective) of humanity or the earth? How valuable, in similar terms, have the bottom 10% of those people been?

And that's why - among dozens of other good reasons - it's entirely unreasonable to judge a person's life in such a manner.