This looks to be one of several ways to make H3. I’ve heard the fusion reactor companies say that they can make H3 from seawater. Its all expensive of course.
It is rare in nature and not immediately available for use in potential power plants. However, there is a process to produce tritium. For example, exposing the more common element lithium to energetic neutrons can generate tritium through a low-energy nuclear fission reaction.
The bigger point is- Would you build a gasoline engine before you located a source of oil? Probably not!