Ah, yes, the "efficient market hypothesis", it's well known that no company has ever gone bankrupt because every company only does things that are optimally efficient and profitable.

No company has ever made an investment in something that ended up being more expensive than calculated, or so expensive it bankrupted them.

You are assuming they will commit to the solution and ride it to their grave trying to make it work. They will experiment and figure out a way to make it cheaper, or they will give up. They have plenty of money to experiment with this.