Theranos was located in SV and Holmes referred to it as a SV style company, you might argue this is enough to make something a "Silicon Valley Company". I think OP would view such a company as one both in SV and embraced by the local ecosystem of developers and investors. I think SV "learning a lesson" from the downfall of a company only makes sense for the latter definition, and I don't think Theranos fits it.
In reading Bad Blood it becomes apparent that, Tim Draper aside, the SV investor community realized much earlier than anyone else that Theranos was shady and either pulled their money or stopped investing. As someone living here in the area at the time I felt it was common knowledge in dev circles that Theranos was shady and lying about their capabilities (though not to the level that was revealed). Certainly it did not seem to be a prestigious place to have on your resume.
Given that the SV ecosystem seemed to largely sniff out Theranos before the rest of the world it seems weird to expect them to learn a lesson from its downfall.
The answer to this depends a lot on whether you consider e.g. Arrillaga-Andreessen "SV" or not. Holmes certainly wanted Theranos, and herself, to be viewed and valuated as such.
I knows Theranos was headquartered in Palo Alto for part of its life, but is it really a SV company? Looking at their board I see mostly old-school business people from a construction company, Wells Fargo, and James Mattis and a former head of CDC. Only real tech person seems to be someone from NetApp. On the investor side, I don't see any of the big SV names either. Initial funding came from Rupert Murdoch.