It is supposed to have limited powers acording to the constution, but it has assumed more and more powers during the last two and a quarter centurys. The founders never envisioned the type of over regulation and the intrusiveness of the current federal government. Their vision was of a realitively small ferderal government and state governments that would regulate, or not, the type of personal behavior laws that we are discussing.
As for every other government on earth having limited powers, well you probably didn't mean it that way, but if you did, I would remind you of North Korea, Cuba, Iran, Iraq, Sudan, China, Zimbabwa, Pakistan, Libia, etc. I don't imagine their citizens would share your views that their governments powers are limited.