Earlier quoted context omitted.
Well, if we know positively than human body can't stand such travel, then the only answer to colonize mars is sending humans that doesn't have a body. This could solve the problem.
Or just a more ambitious plan, including funding for advanced radiation shielding, a rotating section for gravity etc. we can do it, but it’s going to take a lot of work, money, and time. All people seem to want is a magical billionaire.
Some interesting moral questions would arise, like how can you volunteer and agree to go to mars if nobody asked you before to send you to the space?