[1] https://www.tesla.com/support/energy/tesla-virtual-power-pla...
I'm not saying doing so is trivial; aside from the equipment cost, many/most/all of those stations will also need electrical supply upgrades. But they at least already have the land, and a company like Tesla will have to deal with equipment cost, electrical supply upgrades, and the cost of acquiring land.
People said this all the time about Tesla a few year ago. But the stock value back then is easly justified by what they have achieved since.
So the reality is that 'Tesla fans' were not irrational, but they were simply correct. And the people who endlessly repeat the 'market can stay irrational longer then you can sty solvent line' were simply wrong.
Its also an absurd fantasy that Tesla stock is only carried by irrational Musk fan boys. When in reality is mostly large institutional investors who do the same financial analysis on Tesla as anything else they buy.