We agree, utility scale solar is cheaper than rooftop. However the vast majority of (over 97%) of electricity in the USA is not from Solar. Also keep in mind,

We agree, utility scale solar is cheaper than rooftop. However the vast majority of (over 97%) of electricity in the USA is not from Solar. Also keep in mind, just because your power company can build solar 3x cheaper than you can, does not imply they will sell the power to you are 1/3rd the cost. They have to service the loan, provide a profit, pay off any insurance/risk mitigation, have stock holders, etc. etc. etc. After all the current price you pay for kwh, is a combination of the cheapest power your power company can find, and is often high enough for numerous vendors to offer "free" solar and charge you less than the power company does for power.