If a law is invalid it has no force. If a person is an invalid (different pronunciation) some powers are limited or reduced. Invalidity in both cases changes a previous assumption from use and application to need and lack.
Invalids live in a world of ifs, maybes and laters. Usual aspects of daily life have to be adjusted, assistance is often necessary and everything is slower. I know about all this because I fell at my home and damaged a shoulder. It’s surprising how many acts require two arms.
No one would recommend such physical limitation but much can be learned from it. Most prominent in my experience is the help provided by people. I do not have family to lean on; I have not (yet) employed professional help; daily living has depended on the kindness of others. What a blessing it is to have attentive caring friends! Care institutions are in the near future.
Another education comes in simplifying. Indulgences, extra pleasures and non-essential activities are evaluated against their new difficulty. What’s really important is prioritized over casual busyness. Some nice things are not worth the effort. But one must continue to maintain personal relationships, especially with those that step in to help where needed.
Planning is more important. Spontaneity is less feasible. Appointments are needed with all who supplement daily activities. You can learn a lot from disability.