Okay, the insults and condescension aren't necessary for my understanding, maybe they are for your ego however. I think you're missing the fundamental point that it isn't just about bandwidth, its about accessibility, redundancy as well as (ultimately) sovereignty and energy/land independence too.
Multiplexed, minmaxxed lab conditions can push PBs on a 'single' (10-32 multicore, semantics kek) fiber, sure. That is not whats laid in the ocean. Our best transoceanic cables can maybe pull 200, 300tbps on their lonesome. IRL we need big networks of them with ample repeater infra to get your stated numbers, but you know that. Global capacity is on the order of ~1.8pbps atm though these cables. Growing ~24% yoy. Starlink already runs ~1/4th of that with 10k gen2 satellites.
Someone has to lay that fiber, splice and connect it and maintain it just the same as satellite infra. Most residential fiber is NOT buried... its overhead, vulnerable and breaks all the time; I know because I have fiber in 2 of my 3 houses and over 5 years has worse uptime than my coax ever did.
You're not connecting the fiber last mile for all humans who want internet. A fool's errand. Can we agree on that fact? ~40% of people live in a non-city, 'rural' area on Earth; hardly a small market. 2.2b don't have internet at all because incumbents are too strapped to expand terrestrial networks anymore; the margins aren't there.
Incumbent business models die on the altar of serving the last 30%. They access convenient, bunched-together captive markets & have a general monopoly due to deployment cost moat. Capital efficient and great on the sheet for now sure as you've said, but not any longer an expanding growth curve; rather a contracting one with a competitor like Starlink on the heels. Datacenter buildouts are a final holy blessing on their businesses that won't last on Earth forever.
Gen 3 Starlink sats do 1 Tbps max down 160gbps up.
46,000 of them (planned) will absolutely eclipse current terrestrial internet capacity. It will take Starship ~760 launches to achieve the entire 46k shell with gen3 sats. 400 Falcon launches for the current constellation of 10k took 7 years. Lets say it takes 14 years to launch them all (lol)..at current cagr, terrestrial fiber internet cap will only 4-5x today's number in that same time even with current growth metrics supercharged by terrestrial data centers.
Thats 46pbps down from the v3 constellation, greater than projected fiber capacity down the road. 8, 16 ways its still more than global internet throughput capacity today.. you are seemingly certain Starlink engineers have no clue how the internet works, or what they're competing against. They're out of their depth; so I suggest you should build the future services for humanity instead. Join up and get those sweet RSUs and become rich off their sham, yeah?
I'm not going to pretend I know everything since thats your domain obviously, but it bears considering that throughput is only one part of the equation.
The real cash play in my eyes is the datacenters in space. Global Internet is just the warm up. If you are the only one who can provision such technology at scale, with free limitless energy and cooling on your orbiting racks...who gets all the money such services provide? Who controls the AI onboard?
We're talking AWS in space, on the Outernet, on top of all the compute needed to run the most advanced AI models...in the hands of one company. We will never lay Fiber to the Moon or Mars, or in space where the future of capitalism lies. Ten trillion imho btw don't bother replying cuz I blocked you for the lulz