Because Germany's economy is lopsidedly export driven.

So? That still doesn't explain why they couldn't build a munitions factor - or several - if they were pressed to. Certainly not that it would take one hundred years for them to do it.

To borrow your phrase, come on. We're concerned (correctly) that a economically crippled country like Iran can put together the facilities necessary to build nuclear weapons, and you're claiming that an advanced western economy like Germany couldn't manage to build conventional military equipment for 100 years? That's just ridiculous.

Have you followed German efforts in their energy sector?

Yes - and I'm not sure why that helps your argument. Their efforts in the energy sector, as documented in the articles that you yourself linked, show that the German "pols" are perfectly capable of re-prioritizing an industrial sector when needs must. With Russian gas unavailable, they're plowing ahead with domestic fossil fuel production again. Policies change. You can't extrapolate a rate of production that existed before the change of policies. No mention in your articles that it will take them a century to build some new gas plants.