Remember that not trusting mainstream medicine is no reason at all to trust non-mainstream medicine.

Non-mainstream medicine advises us to eat garlic with alcohol, wash with saline solution, take antibiotics, and burn down a mobile phone mast.

I wonder if it's a mistake to treat all "non-mainstream medicine" as a single group here.

I'm not a physician, but I find some elements of non-mainstream medicine (e.g. certain teas can ease certain symptoms) more plausible than others (e.g. burning down a mobile phone mast helps with prevent covid19 spread).

Absolutely, but it can be difficult for non-specialists to tell them apart.

The anti-5G nonsense is spread with a similar anti-government spin to the original post by Alex3917.

The herbal tea market includes everything from making your own ginger tea, to a box costing $20 and promoting some idea of ancient Indian spiritualism and vitality.

It is a mistake. One that is made by both proponents and opponents of non-mainstream medicine.

Here's a nice quote from the (admittedly strawman-laden, but imo still nice) Poem "Storm" by Tim Minchin (https://youtu.be/HhGuXCuDb1U):

Do you know what they call alternative medicine that's been proved to work? Medicine.

Of course the provedness of medical treatments can vary, but statements on a random online shop don't really cut it for me.

Many natural remedies have studies backing them up, yet the mainstream medicine outright refuses to use any kind of nstural medicine, simply because there is no money in it. You can’t make lots of money selling garlic.

Remember "mainstream medicine" includes countries outside the USA, where the profit motive is reduced, sometimes to zero.

In light of this, your claim makes much less sense.

I was going to ask what country with mainstream medicine has no profit motive, but then I saw your strawman where you equate herbal tea with chopping down phone masts.

Word of advice - pull your head out yer arse.

I expect you can make lots of money selling garlic, otherwise nobody would grow it.