The upside was they got lots of data to improve the next rocket, which they already did. It's ready to go again, just waiting for FAA approval.
Or they could have done that the first time with a flame trench and a water deluge system that prevented the energy of the rockets from damaging the rockets dooming the first stage and making concrete rain on the neighboring wildlife reserve.
Elon could have verified that hypothesis with a full static fire test AND be able to see the damage to both rockets and pad from an actual launch without destroying a rocket.
This is why SpaceX grew from the start with an immune system to prevent Elon from ruining too much stuff.
I believe he’s better observed in Twitter, which is a company that didn’t develop an immune system to deal with him.