I think you are onto something but you are following with wrong conclusion. Web developers don't forget about those people - it is businesses that forget about

I think you are onto something but you are following with wrong conclusion. Web developers don't forget about those people - it is businesses that forget about those people. Those people are a niche and probably a niche that is not profitable catering to. So they are excluded from the internet by a lot of companies. If there would be enough money to be made, a lot of web applications would have at lest 50% of those requirements implemented already.