Cost/bureaucracy of doing business is a common annoyance unfortunately, not exclusive to one or other country and those should be passed onto the consumer.
These are rarely trivial on a small scale, small margin business.
That, as well as a way for companies to stiff competition - https://sermondo.com/the-new-german-packaging-law-amazon-fba... : "Not participating in the system may be punished with a fine of up to € 200,000. It is conceivable that competitors will enforce the distribution ban by civil law."
These are rarely trivial on a small scale, small margin business.