I don't know about the pine debate... but could it be that part of the issue is that softwood beddings may often contain a mixture of woods and not tell you exactly what's in them? It could be that pine by itself is OK, but that other things (cedar, spruce juniper, etc?) that might be mixed in are not?
No dog in that fight, just wondering.

Personally, I would not use it. If it says "weichholz" and doesn't say exactly what kind (I do speak German and read everything on the package I could see in the photos), it probably isn't pure pine anyway.

You could try CareFresh: https://www.omlet.de/shop/hamster/ha...160b486c1cf957

(I don't know that website at all, it just came up when I was hunting for that product in Germany).

Anyway, CareFresh is made from recycled paper. It's soft and absorbent, doesn't make dust, and is easy to clean. I used it for years with a corn snake and a ball python. I switched to aspen with the new guy, but I think I might go back. Some people think there is more risk of problems if the snake swallows bits of it than if they swallow a couple of wood shavings, but my experience was that it didn't tend to stick to prey items much, plus the ball python always compacted his down pretty quickly, so there weren't really loose bits of it to get stuck on the food anyway.

The down side of it is that it is harder to keep a thin layer over a UTH, but it's not impossible. You can also keep the UTH area clear of bedding and just use a paper towel there, with the bedding all over the edges so the snake doesn't go underneath.