There were women druids. They weren't all men.
The rise of the monotheistic religions from the middle east caused enormous disruption from the common knowledge of the past.
Take elder for instance.
Ask the hag before you take fruit or flower or stick from her tree.....basically it's a brittle kind of tree, and if you pull on it, or climb it to gather, it'll often break under you.
The jelly ears (and yes, I know that there's a huge divide among some bushcrafters about this name, tough, those who refuse to use the Jew's ear name have very good reasons for their choice) that grow on it, medieval religious opprobrium blamed the Jewish for Christ's crucifixion, and the Jews were targeted when any social ill arose. Their ears were cut off as a clear and unmistakeable sign of their Jewishness and punishment, and those ears were nailed to the tree....like some trees became known as the gallows tree,
So the church disapproved of any sign of respect to a pagan 'hag', and of the Jews, and the elder tree became the evil tree that was used in the crucifixion.
Thing is though, the elder doesn't really grow in the middle east, it's a tree of temperate climes and the tree is very useful herbally, but the hag bit...they couldn't stomach that, so the tree was evil and much knowledge of it's usefulness was suppressed and forgotten.
Now, repeat that kind of thing for
every plant that had some kind of pagan significance, and suddenly it makes sense why Britain has such a poor record of things like fungal gathering and use, and add in the Industrial revolution, when the UK became the first country in the world to overturn the rural/ urban population balance, and even commonplace food plants became ignored and forgotten. Now occasionally somewhat scathingly referred to as 'famine foods'. Instead we import huge amounts of stuff like chia seeds, when our own native seeds are easy to grow and harvest and healthy eating too, but don't come with all the hype and advertising.
Add in the way that those monotheisitic religions looked at women's roles in society, and their suspicion of any woman knowing something that a man might not, and there's the tie in with the 'witch' thing.
Fear and social conditioning are powerful tools in a patriarchal and monotheistic world.
Now of course many herbal products can't be advertised because the producers cannot afford the 'scientific' testing that would make them acceptable to the regulatory authorities.
Not all a bad thing, but it is very, very limiting.
Sorry, rant over
M