The middle paragraph, translated to English:
Drinking warm water from the hot water pipe is only recommended to a limited extent. Because it has stayed in the pipes for longer due to the circulation in the hot water system. Circulation is necessary so that everything comes out of the tap hot enough to avoid legionella formation. On the other hand, depending on the cable material, substances can come loose. Even if the quantities are small, you should always use fresh water from the cold tap when preparing food.
So yes, you're right. It's not recommended to do.
This is the way
It’s found that closing your eyes and pretending to sleep (I listen to podcasts so I have more patience with this) makes you better rested than being up and about or laying in bed on a phone. If I genuinely can’t sleep, I reassure myself with that. Most nights, despite PTSD, I’ll get at least a couple hours of actual sleep this way.