Funnelling a lot of government money into the pockets of the best candidate for the world's first trillionare.
If the point is a colony, then we should just do it on the moon. If the point is for the advances in technology it will bring, we don’t have to go to Mars to explore those things. We could just keep practicing on the moon.
Obviously it’s not exactly the same but idk, most of why I’d be interested in our going to mars can be answered with “it’s easier, more feasible, and generally just as useful to do it on the moon instead.” It’s still low gravity, no oxygen/breathable atmosphere, a hostile desert essentially, etc. but far closer. We can respond to emergencies more easily. We know for a fact we are currently capable of getting there and back safely.
TL;DR: we will likely get a lot more out of dumping our resources into trips to and from the moon and building something there than trying to go to mars for a very long time.
Mars sucks. The moon sucks too. We need rotating space habitats. With gravity and hookers.
Mars is infinitely more viable than anywhere in Venus for the simple fact that you are on solid ground with resources all around you.
Without orbital infrastructure shipping supplies in neither are viable.
Mars is a total boondoggle - a colony would require constant supply runs from Earth to support a double-digit population - who is going to field the cost and what are they going to do there ?.
"The Martian" was work of fiction.
A lunar colony is cheaper and way more feasible.