> Comcast has received decades of subscription fees, and if they didn't allocate part of their budget to infrastructure, they have only themselves to blame.
It's a bogus argument but you're missing what they're saying and responding to something else. They're saying it's irrational for a competitor (competitors don't have the infrastructure yet) to sell for $30 a month when it costs $1,500 to install that infrastructure. They're not saying it would be irrational for them to charge it, indeed, they could probably do so.
The problem of course is that it's not irrational, it's Total cost of wiring up an area/# subscribers = $1,500. And some subscribers will pay $30, some $50, some $100, some way more because that same fiber is being used to provide legacy cable and telephone services to a particular class of customer, namely old farts, like half of Slashdot.
Yeah I said it. You're old farts.
Anyway, the point is it very much makes sense to use different price points to get as many customers as possible because that $1,500 isn't going to go away just because someone doesn't subscribe. If the only way to get the last few residents in that area is to charge them $10 a month, it makes sense to provide a tier for them too, as long as others aren't attracted to the same deal.
For the same reason, Verizon and T-Mobile are currently offering "back up" services for about $20-25 on their 5G fixed wireless network. Why? Because every penny that comes in justifies upgrading those towers.
Comcast - or rather their CEO, I'm sure their experienced employees were head desking at the comment - just doesn't get tiered pricing and somehow doesn't understand that a massive proportion of infrastructure costs are fixed and do not change based upon subscriber count.