OP you’re not wrong that this is deranged. Why anyone would have an IV infusion unnecessarily is beyond me, and I’d have to question the ethics of the doctors who are prescribing these, and the nurses who are making and administering them.
I can’t see any details of the actual medicines used, but given the ability to tailor the drips, and from photos online, they are presumably licensed bags of glucose or saline, with vitamins and electrolytes added using a needle and syringe. If these are made up immediately before administration the risk of infection is relatively low, but still... madness.
However, these are NOT Vamin. Vamin is an amino acid (protein) mixture used as one of the ingredients in parenteral nutrition. The bag in your photo will be a mixture of amino acid solution, glucose, vitamins, electrolytes and water. (I’ve also spilled PN all over myself at work - the smell was terrible and it was pretty sticky, but it didn’t burn?)
I know you are concerned about PN supply security - and rightly so in my opinion - but nothing these Get a Drip people are doing significantly affects the availability of either your DD’s bespoke bags, or the off the peg bags you have as backup.
Having said all that, people using IVs as fashion accessories is crass, and I can see why it gives you the rage.