The U.S. government already funds a lot of research including some on conditions (or non-medical problems) that don’t affect the majority so that doesn’t seem to be an actual barrier. Polls tend to show Americans support existing funding [0].

Obviously there is a limit to how much spending the public will support, but I don’t think it’s a complete nonstarter.

[0]: https://www.pewresearch.org/short-reads/2018/07/03/americans...