Earlier quoted context omitted.
Glasses which focus at your computer distance (which varies by personal preference; measure it and take that number to your optometrist) help with presbyopia. However, there are many other eye ailments which tend to appear later in life and which glasses alone cannot correct: cataracts, macular degeneration, corneal dystrophies, etc. Some are treatable through other means such as surgery.
The majority of people who lose visual accuity as they age don't get macular degeneration or cataracts during their working years, they just need reading glasses. It's a bit like saying 'my head hurts' and someone says 'take some tylenol' and you say 'some people have flesh eating brain viruses or prion diseases'. You're not technically wrong but those aren't the things that affect most people complaining about font…
However, I think you are understating the problems posed by other conditions. The prevalence of cataracts by age 64 is in the neighborhood of 15-20%.
https://www.nei.nih.gov/learn-about-eye-health/outreach-camp...
It's a good bet there are some people reading this who have been treated for cataracts.
> you say 'some people have flesh eating brain viruses or prion diseases'.
Dismissive attitudes like this among the visually acute are one reason website accessibility is generally so poor.