Tritium is an extremely weak beta emitter. It can’t penetrate paper or even your skin. If you straight out guzzled gallons of it, you might raise your chance of getting cancer by a measurable amount.
And not only is our ocean full of it - it keeps getting made.
It really is a miracle. Sure the universe will burn out one day. When it ends, the universe will have been 100% unlivable for eons.
My beef with it is, I am not sure it can be made commercially useful at any time in the life of human beings on this planet. I think that possibility is so remote that all efforts now are mere curiosities, more likely to be learning opportunities than profitable ones.