If a person wants to stay in their home until the day they die then increasing the homes value won't be seen as a benefit as they would never realise it.
Also, if they want video conferencing then they may not need it full screen. If you only have a quarter of the screen displaying video then SD density requires much less bandwidth as there are fewer pixels to cover. Also of course they will see a better quality their end as it will be the download that delivers them the video - it will be the other end that has lower quality and therefore why should they pay to increase the quality for the other person?
Whilst your arguments are reasonable for many people they won't cut if for others - both of those arguments can be easily argued down by someone in their 60's who don't see the benefit of higher speeds. If the current speed is "good enough" and they don't want to sell their house then any extra money spent would be seen as wasted.