Solving important problems take a lot of customer research, domain knowledge, and years of developing product and finding product-market fit. You won't be able

Solving important problems take a lot of customer research, domain knowledge, and years of developing product and finding product-market fit. You won't be able to come up with a MVP over the weekend. Naturally, the lower hanging fruit is first picked. But these services and products that first get built will become the shoulders that startups solving more important problems get built on.