Internet interconnection is different then ethernet, this makes your post suspect from the start. I am not so sure about the availability of really high-speed internet if the customer is willing to pay.
We are in a small town in southern Oregon. 8 years ago, I checked on even getting cable internet to our house, and the cable company was not willing to extend their network the 4000 feet we needed. Even if we paid for the entire extension ourselves. I told them that $20k was not out of the question, although I would have preferred less.
For years we had DSL from the local phone company, which was advertised at 1.8 Mbps, but measured 0.3 to 1.2 depending on the day and who had squawked the most recently. They had a few good pairs, which they would rob from someone else when we complained. Then they gave them to others when they complained and put us back on the noisy ones.
Right now, we have a provider who has microwave internet, which is not very common. We get almost 3 Mbps which is great compared to the old DSL, but not "modern" in any sense.
I admit, I never checked on fiber optic, but suspect that right-of-way issues would make it impractical for costs under several million$.
We would love to have any improvement.
Check with your local carrier and not the cable company. Pulling fiber is not that uncommon. Once you have fiber back to the CO or more local point of presence (pop) that is common to your internet provider and your local loop (fiber optics) you will not have much difficulty getting connected.
Again, it is all cost base.