Thanks for giving that link. Highly recommend reading it for anyone. And, honestly, this makes me think I should be reading the announcements of all Nobel prizes now. Did a really good job summarizing the reasons.
My understanding would think diet change could work. But only if you manage to starve the bacteria. Anti biotics are much more straight forward and effective here. Obviously finish your dose.
That said, I've never had an ulcer, so have not actually read much. Other than finding it was none of the root causes I heard growing up.
Ulcers, in particular, was huge. So much of previous advice for dealing with them was just flat out wrong.
If this pans out, I'm very interested to see where it goes next.