It's sad that you frame this as "whatever problem you want them to work on". As is there should be any doubt.

It's sad that you think your priorities should be everyones' priorities. Find like-minded people and get to work. But what people get inspired of is none of your business to judge.

I feel perfectly entitled to judge those who spend their days dreaming of Mars as a solution to their problems.

I will not support such efforts, and I feel quite comfortable being a detractor as well.

Who are you to tell me what to judge?! This argument gets you nowhere with me.

They aren't dreaming of Mars as a solution to their problems.

They dream of Mars as it is exciting and will lead to new knowledge, understanding, and meaning.