Census blocks aren't equivalent to households. Most of those census blocks are going to be rural with few people living there.

That is true, and you can look at the data in different ways. But still most households don't have at least two different high speed internet providers.

That's just not true. Depending on what you count as broadband 60-90% of households have two or more fixed options:

https://arstechnica.com/information-technology/2017/06/50-mi...

Yeah, if 1 household has an option greater than what, 5mbps, that whole census block is considered as having options...

For my home, 2.5mi from the Capital Building in Washington State, I'm offered four wired broadband providers: 1. Comcast, "advertised 100mbps to 1gbps" (true enough, although you can only get 150mbps, so I'm not sure if that's bracketing) 2. CenturyLink, "25-50mbps" (CenturyLink's own website says "Our systems indicate that our High Speed Internet is not currently available at your service address." I tried several other streets in the area that indicated that none of them had availability either.) 3. Platinum Equity LLC, "10-25mbps" (err, Platinum Equity is an investment firm - oh, one of their portfolio offers "T1 and Bonded T1" lines to businesses and after further investigation would offer me 192K SDSL as a residential offering) 4. Integra Telecom Holdings, "3-6mbps" (a Vancouver telco that does business fiber). So there's one - Olympia, WA.