I am sight impaired and am involved in a networking group for working sight impaired people. Just to set the scene before I tell you why this statement is unhelpful.
Blindness is a spectrum. Someone can be registered blind as they only have light perception, or they could be registered blind because they have a condition like RP which drastically impacts their feild of vision. The latter of these two examples could use a computer screen right up to when they finally loose all their central vision, the latter would only be able to use a screen with a voice over reader.
I am personally registered sight impaired rather than blind, but my visual accuracy is 20/100, someone with RP may have 20/20 vision in what vision they have remaining.
We are all so vastly different, even those with the same condition have different needs. There is also the difference between those of us who were borm visually impaired and those who lose their sight over time.
So just because you know someone who is 'blind' and works doesn't mean its easy for every visually impaired person to get a job, they need support and some people will not be able to find a suitable role in the current climate.