Well sure "disability access" can be a thing
One office I worked in had a lift out of service for four months and still scheduled meetings on the third floor
Another one is in a huge building with meeting rooms spread across it, some can be accessed by lifts others can't and if you don't walk quickly enough when one meeting ends at half past and your next meeting at the other end of the building starts at the same time then comments are made
Then there was the building where there were normal external doors and a revolving one. We had a colleague with a guide dog be told that everyone could now only enter the building by the revolving door even though the dog struggled to guide my colleague through it
Then there was a colleague who was yelled at by the receptionist for parking in the one disabled bay because the CEO liked it to be kept free for him, the CEO wasn't disabled, my colleague who was yelled at had a blue badge.
I've seen departments be restructured and coincidentally a far higher number of disabled people be made redundant than able bodied people
I've seen WFH hours be removed from people who can only work with them in place, flexible working arrangements and part time hours turned down "because otherwise everyone will ask for them" etc
So sure many could contribute some useful hours weekly but the reality is if you can't do full time hours, or you have a physical impairment that makes it harder for you to access the qprk space, or you have a higher amount of sick leave then no matter how useful your contribution is employers aren't necessarily all that interested in employing you.
I have a team where their entire job can be done sitting down (coders) and we tend to work remotely. Despite me speaking to HR on multiple occasions about our job advert wording they still only talk about how they want to encourage women into the workspace. they refuse to say that the job can be done by people with a range of disabilities, even though it can, because realistically they don't want to actively recruit people with disabilities.