It's an excuse all the same; if you can put electricity and phone lines on every address, fiber isn't that much harder. It' just that major ISPs in the US are sociopaths and don't like the margins you'd get with such a setup. Slow, overbooked connection hubs and for-profit-DPI and data collection (and sales) on an ISP level is the norm. Even net neutrality isn't something the government is capable of accepting and enforcing.