I'd like to begin this reply by saying that I don't intend to "dogpile" on you or insult your character, but to convince you that money spent on space, and science in general, does help the Earth. So please don't read this in a condescending tone.
If by "fixing our planet Earth" you mean "fighting climate change", then you should look at the climate-related science done in space and on the ISS, like
this article by NASA.
Otherwise: science has many, usually unforeseen, knock-on effects. NASA helped make many things that it rarely gets credit for, like modern cameras.
NASA gets less than 1% of the federal budget, and it's not like the money is literally shot into space. It's put back into the economy. The money goes to highly-skilled individuals to hone their craft, manufacturers all over the country, inspiring and teaching the next generation of problem-solvers, and all sorts of places.