Those other businesses have an opportunity for profits though. If you build a nice car, you can sell them at a premium price and the big automakers aren't going to compete until your unit numbers are big. If you make autonomous cars, that could certainly make money, and you get R&D tax incentives in the meantime. If you make cheaper space transport, the competition is still locked into their high cost systems.
If you wire up a rural area, there's not a lot of customers and probably they won't be willing to pay premium prices. If you overbuild an existing area, you usually have to compete with the incumbent telco and cableco and both of them can use other areas to subsidize network upgrades and price drops, so you can't charge a premium price.
If you wire up a rural area, there's not a lot of customers and probably they won't be willing to pay premium prices. If you overbuild an existing area, you usually have to compete with the incumbent telco and cableco and both of them can use other areas to subsidize network upgrades and price drops, so you can't charge a premium price.