Anything that's coming from Musk has a huge hype, for better or worse.
"the SpaceX CEO argued that Starlink won't be a major threat to telcos because the satellite service won't be good enough for high-population areas and will mostly be used by rural customers without access to fast broadband."
https://arstechnica.com/information-technology/2020/03/musk-...
Source - https://en.wikipedia.org/wiki/Starlink
It's typical Musk - announcing something that sounds super cool and impossible, because it's impossible. Ad later quietly scale it down to something still pretty cool, but nothing like it was presented initially. And ride the hype as much as you can in the process.
Some of this might be coming from real-world experience with the network and an update on previous incorrect assumptions. Part of it might be simply making bombastic claims.
Right now, Starlink hit around 100,000 customers with 1,700 satellites. With the full 12,000 satellites we'd then expect 700,000 customers. That might change given that the satellites aren't geostationary and they haven't launched in many countries, but to hit a million customers in the US, they'd need to increase the number of customers per satellite significantly. Maybe there are improvements they can make that we don't know about, but it seems like Starlink's advantages are in making cheap rockets and cheap satellites - which is very cool, but they likely don't have radio advantages.
Starlink is also thinking about an additional 20,000 satellites so it's possible that they'll just keep increasing the number of satellites. Still, if they're seeing linear gains, that's still a relatively small number of users even with 32,000 satellites (and even the 12,000 is 4-5 years away).
https://www.techdirt.com/articles/20210510/08050146767/elon-...
The joke here is that the lucky few percent of people who can get fiber here have two choices, but the rest of us are stuck in the 1990s. And this is a dense area, far more dense than 100 miles W of here in the little towns of population 1k that can also get fiber from their local telco co-op.
Notably these are all of the Starlink customers I know despite living in a region with vast rural areas... I've heard from a couple people I know out in the country that they are stuck on the waitlist. I think Starlink may have prioritized urban areas first for whatever reason (just higher customer count presumably).