Exactly. This is why I am pro exploration but not colonization. At least not until we can terraform. Colonizing mars now would be a huge waste of resources.
Depending on the definition of colonizing, however. Does sending 100 scientists there count as exploration or colonization? I'd be in favor because the discoveries they'd make about the history of life on Mars would radically weaken mythological stories of religion, it'd be a death-blow that would advance Enlightenment another notch, after the work of Copernicus, Galileo, Kepler, Newton, and Einstein.