I appreciate your concern. I certainly had something. It certainly sucked. I certainly shared a lot of symptoms and remission factors with other people who identified as having chronic lyme. I certainly had Lyme at some point in my past.
I agree that "alternative medicine" can be a hotbed of pseudo-science and sketchy treatment, but I also think that in terms of a lot of these chronic auto-immune related conditions, our evidence base is still pretty small and there's a lot we don't know. And the dominant Western medical system tends to do much better with acute conditions with a clear etiology of cause/effect than nebulous clusters of symptoms (see also, all of mental health).
My hunch is that chronic lyme, just like for example chronic fatigue that lasts for years after Epstein-Barr, is some sort of auto-immune condition triggered by the initial infection, even if the initial infection is gone. With Lyme it is a little more complicated because there are spirochetes involved.
I assure you I've probably read everything that the NIH has put out about Lyme all the way to some of the wackiest all caps blinking sketchy sell-me-vitamin treatment websites out there, as well as chronic fatigue (I spent the first 7 of those years considering it CFIDS). It nearly destroyed all of my 20s.
Treat prophylatically or not, but try not to get Lyme, that's all I'm saying.