I was exclusively talking about the EU ban, not about some random US cities’ bans (This is a thread about Germany after all). None of your points really apply to the EU ban.
It does not ban the distribution (you can still legally buy leftover stock - my local cinema seems to have a century’s worth of supply), just the first-time sale of newly produced non-medical single-use plastic straws.
The “medical exemption” is not on an individual basis, but an exemption for a production line of straws. Everybody can buy the straws afterwards. The EU ban is not cutting a “lifeline” for disabled people.
The links you provided talk about bans by local city councils in the USA, which have their own (apparantly stupid) rules.