If diversity results in such a benefit, if it "financially works", then why is there a need for this artificial injection of diversity? And where's the data to

If diversity results in such a benefit, if it "financially works", then why is there a need for this artificial injection of diversity? And where's the data to support this? If you created a renewable fuel source that cost half of what traditional fuel does, you'd own the market in a heartbeat. You wouldn't need campaigns to convince people to save 100 a month. So why do we need to convince people that diversity is a good idea? You can only blame the big bad white man for so much.