Industrial processes use A LOT of hydrogen, and most of it is derived from hydrocarbons. The best use for “green hydrogen”, by far, is replacing grey industrial hydrogen.
Only then you can start replacing non-hydrogen use cases, like industrial heat and power generation and (eventually) transportation.
The fact that this is up for debate is a testament to the success of the misinformation we’ve been exposed to for thirty years or more.
Orientation doesn’t matter as much as you’d think on overcast days. And this is Germany. Also, transmission is a thing. So unless your “perfect world” also includes perfect weather and upgraded physics, you are just not really making sense.
In the end you’re just yet another person ginning up excuses for inaction by distorting facts. And god knows we good plenty of those.