If we’ve learned anything about this planet, it’s that it does a hard-reset every now and then - which is important. That’s how it works.
My guess is he wants to leave his “pyramid” behind so that if in the future something like that happens, it will be found.
Just my guess, but if you want to look at the bright side, think of all the mouths it fed to get it done.
Capitalism
Looks like Elon Musk envy to me.