Lack of foresight isn't exclusive to capitalism. Would socialist data centres be built to handle temperatures several degrees above the highest ever recorded temperature?
Even in a socialist economy, building systems with an excessively high tolerances would be seen as a poor allocation of resources.
It could be equally argued that capitalism favours private companies like Google ensuring their DCs are as fault tolerant as possible, to ensure they have a competitive advantage. There's also plenty of cases where companies sell unnecessary and excessive goods and services to maximise their own profit.
> and being done with it potentially forever if its made to be repairable/upgradeable
DC cooling systems are repairable and upgradable. They're a far cry from a residential split system AC unit.