That's assuming that the methods used to undercut are beneficial when in reality they're just optimizing for profits over health outcomes. People don't have enough of a choice for it to matter, most people can't just find new providers. Same with ISPs
Yet we have cities with multiple ISPs which have incredibly cheap internet at blazing speeds. In my city we have 1Gbps fiber for $70/mo and the price goes down quickly as you reduce the speed. That's better than some areas of SF I think, and we only have 2 major ISPs here.
Amazing what a little competition can do. The city was smart enough when the competitor moved in to install the capacity for more ISPs to utilize the existing conduits in the future.
In Romania competition + initial lack of regulation and lucky timing led to incredible speed + cost (my ISP just launched 10Gbps fiberlink for 10EUR/mo; 2.5Gbps is 9EUR/mo, 1Gbps is 8EUR/mo, 500Mbps is 6EUR/mo and the slowest option). That said, I think we just got incredibly lucky and I wouldn't advocate "lack of regulation" in general.
We can ask why those areas with no competition are so, and it is due to overwhelming anti-market bias that makes it hard for other ISPs to compete or even outlaws it directly. Meanwhile cities that have setup one touch laws or fixed right-of-way have seen robust competition emerge.
One area where markets do poorly are where the cost of service exceeds profit, like rural areas. This is an area where government intervention in the form of subsidies can help, but these can also cement single ISP marketplaces if not managed well.
Sounds to me like ISPs should be regulated or managed the same way as telephone and electricity providers
Along with healthcare
People don't seem to have issues getting electricity service or telephone service in those regions. In this case, the special treatment of those services means that people don't get left out
Rich people aren't the only ones who deserve healthcare or good internet
