"Swallowing some of the market held by fixed-line broadband providers should help absorb that cost [of 5G development], ..."
That's more than apparent through the carrier collective marketing strategy, with the sponsored-"news"/advertising blitz on 5G from the neighborhood pole.
"... But the extremely high-frequency nature of the 28 GHz band means indoor coverage will be very poor. Being that 80 percent of device usage occurs inside of buildings, this means consumers would be resigned to 4G LTE or even 3G in those areas. ... As a result, when 5G becomes available, most buildings will require in-building cellular aids for reliable in-building coverage." [https://www.networkcomputing.com/networking/5g-will-hit-wall-literally-2019]
I am guessing that what will be required to make use of the highest bandwidth 5G FR2 (24.25 GHz to 52.6 GHz) is a building external receptor with line of sight connection to the neighborhood poll, and a fiber connection running from that to relay 5G transmitters (or wifi) inside the house. So the technician will still have drill a hole and put a cable though the wall in order to get the fiber equivalent data rates, but 5G will also require some extra hardware.
Certainly LTE will be eventually cannibalized to provide the mobile, outdoors, wall-penetrating bandwidths that 5G will require to maintain current cell phone usage patterns. So everybody will be using lower frequency 5G. But I'm not convinced at all that it can compete with fiber to the home.