Part of the issue is that this rocket doesn't just use hydrogen, it uses cryogenic liquid hydrogen, which apparently is even harder to manage. To quote from an excellent writeup [0]:
> Because it is so tiny, hydrogen can squeeze through the smallest of gaps. This is not so great a problem at ambient temperatures and pressures, but at super-chilled temperatures and high pressures, hydrogen easily oozes out of any available opening.
Elon Musk responded to this article with the following tweet [1], which to my understanding is a pretty reasonable take:
> Accurate assessment. Raptor design started out using H2, but switched to CH4. Latter is best combo of high efficiency & ease of operation imo. Delta-v difference between H2 & CH4 is small for most missions, because CH4 tank is much smaller & no insulation is needed.
[0] https://arstechnica.com/science/2022/09/years-after-shuttle-...