you're saying this only from your point of view, whether or not something is good is relative. you would say it was good enough than nothing although still less effective than meds nowadays to "cure" the disease if you were alive back then, at least it was the best treatment back then.
it's just an example, also i'm not talking about the strong smelling herbals as the treatment (although it's the most popular one that being told in the history books and/or internet). there was lavender being used for antibacterial treatments though they're less effective (since the pandemic happened on the medieval age) so no modern meds invented. it's less effective for us but effective enough for them (the people back then).
By declaring all opinions on a factual topic equally valid
i'm not saying all opinions are valid, i'm a truth seeker myself i don't want misinformation or spreading it. but people can say what they think, it's just us who decides is that info is true or not. that's why i call it as "opinion" not "argument"
but the brain still hardworking to think about something