Okay, but why should I believe you? When any source other than you disagrees?
And kind you, like I said, maybe in a few decades hydrogen will be a cool tech. But even ignoring the inherent downsides like greenhouse gas, losses during conversion, issues with storage and handling, we are probably decades away from a usable solution for production, too.
At present, a hydrogen vehicle comes out slightly to moderately worse than a petrol car for the environment while also costing the user significantly more. Can that change? Sure! Will it? Dunno, do you? Mind you, meanwhile BEVs provide a solution that is mildly cheaper to run and moderately to significantly better for the environment. We have a solution, we should use it. If in 40 years or whatever things look different, well, then that will be the case.