Okay, fair point.

But then, why prescribe the most expensive placebos where you co-finance societal harmful behavior, rather than just prescribing the "harmless" placebos that are not homeopathy, which are usually even cheaper and don't have any ideological overhead?

I'm not aware of any research along these lines, but I suspect that all placebos are not equally effective.

It's a psychological effect, so things like price or flavor or packaging likely affect its strength.

Yea there is research into it, and you're correct

Color matters: placebo colored pills work better than white pills.

Delivery mechanism matters: placebo injections work better than pills.

Idk about price, packaging, or flavor specifically. But delivery mechanism, color, number of pills, etc I remember from a study.

The 2008 Ignobel Prize in Medicine was awarded for a paper that showed that higher-priced placebos are more effective than lower-priced placebos [0].

[0] https://en.wikipedia.org/wiki/List_of_Ig_Nobel_Prize_winners...

I think it comes from our animistic roots. Magic that calls for the sacrifice of a goat is stronger than magic that calls for the sacrifice of a flower because the former requires more dedication from the caster. It would be the same with money.