say you're Shell

you are vertically integrated, you have billions invested in oilfields, refineries, distribution, and the retail channel ("gas stations")

if transport switches to electric, what's your role?

answer: there isn't one, you are completely redundant

but what if hydrogen took off instead?

if you produce via electrolysis, you only keep the retail channel

but if you can get H2 established, then you can do a switcheroo and feed in H2 produced from your existing natural gas infrastructure, and massively undercut everyone's electrolysis business

at which point you're back to the old days, just instead of selling gasoline from your oilfields, you're supplying hydrogen produced from their gas

... and that's exactly what they're trying to do