At least in North America, things tend to maximize corporate profits rather than maximize quality of life.

Everyday goods becoming cheaper have significantly increased the quality of life of Americans. That trend will continue as energy becomes more abundant. Corporations can't monopolize profits on goods that are perfectly competitive.

What has decreased the quality of life, which offsets the above slightly and makes it appear as thought things aren't improving much, is goods that require domestic labor, such as education, whose price has outstripped CPI, and goods that have artificial regulatory capture which cause their price to be artificially high, such as insulin, and demerit goods such as opioids which detract from the utility of the customer.

They are aligned, at least for those things where consumers are the purchaser.

Profits tend toward 0 in competitive markets.

There is no reason a priori to assume fusion power will be cheap. On the contrary, everything we know about it now suggests the opposite.