Hydrogen cannot be created from nothing, what you are proposing is to rip something else apart twice at a expense of energy.<quoted text>
To make a anti-proton you need a very high energy collision. That should make a proton anti-proton pair. Once you make a proton to make hydrogen all you need to do is to expose it to the real world. It will strip an electron off of the first non-hydrogen atom that it sees. Of course hydrogen is plentiful, anti-hydrogen is not. So the antihydrogen gets all of the press.
When it is much simpler to simply extract hydrogen, it's not like there's not enough of it around. Nuclear transmutation can create
one thing to another but when matter is not conserved, the mass and energy associated with matter are conserved.