You are correct but many workers in the US (tech and otherwise) are only aware of unions as historical tools of organized crime/corruption, or are libertarian (which gets higher representation in tech circles) and believe the free market will provide for them and/or that unions excessively harm companies. There are likely other reasons but these are what I’ve heard from people I know.
These views are reinforced by corporate and libertarian (which is of course funded by corporate) propaganda.
Correct, Backblaze is their own host and post on their blog often about their tech and processes. They’ve got a lot of good info on how they designed their server storage racks and stats on drive failures by brand etc