I don’t think you can make a blanket statement one way or the other.
Many new and refurbished churches have wheelchair ramps and spaces for wheelchairs. A person in a wheelchair can just as easily be sitting in a wheelchair at Mass as sitting in a wheelchair in a living room somewhere.
Something similar could be said for people with many other disabilities.
Now if the problem is that the person has trouble with transportation to Mass, then that is another matter. If anyone, whether they have a disability or not, is not able to travel to Mass, then they are excused from attending Mass. But if people have neighbors, buses, and van services available to them, then they should make use of them as often as possible.
Now obviously there are some illnesses and disabilities which might make it unduly difficult for a person to be at Mass. But just because someone has a disability doesn’t mean they are automatically excused.