Of course, if you can show me in the US Constitution where its says we are guaranteed the right to buy alcohol any day of the week, I'll change my stance immediately . Maybe the government shouldn't regulate anything (sure would be nice to let me 6 year old get his DL, wouldn't have to get up so early in the morning to drive him to school). You'd be absolutely comfortable if I let him drive my pickup on the roads you drive too, right?
Show me in the constitution where it says the government can limit my ability to enter into contracts that are perfectly legal 6 days out of the week, but not the 7th.
The constitution doesn't grant me rights. It limits the federal government's ability to curtail them, among other things.