That's because they *think* they can get the money to fund it from those sources.
I'm not sure Mars One is really going to work out though, it seems very shaky.
I wouldn't be surprised, if they found little demons on Venus jk lol
Venus is just like hell, it's ridiculously hot to the point that every lander winds up dying miserable deaths, has noxious gases everywhere, etc. I would not want to go there lol
Mars isn't much better, you will spend a year in a tiny tin-can with the smell of faeces in the air, no entertainment and your muscles will be atrophied to the point that you won't be able to walk.