@autoperipatetikos
other comments have said it better, but I really think that the "use it or lose it" phrase is incredibly ableist and untrue.
Sure, our abilities to do certain things wax and wane overtime, and things do change as we age, for sure, but this phrase invokes a scarcity mindset that isn't based in reality.
True that if you're, say, trying to build muscle in your 50s versus building muscle in your 20s, the process will be very different, and you won't gain as quickly as you would have when you were young, but 50-year-old bodies are very different to 20-year-old bodies.
To extend the metaphor, in certain cases of chronic illness, intense exercise can actually be damaging. It can also be damaging in recovery from long Covid, which mirrors CFS and ME in a lot of ways.
All this to say that yes, sometimes we do have to adapt our daily lives to what our bodies and minds can actually handle, but if a particular activity or ritual or chore is important and fulfilling to us, why would we be asked to give it up?
Sure, try it as a thought experiment, so you can understand potential physical and emotional outcomes of each choice, but also assess if it is actually damaging to you.
You are the ultimate judge on what is good for you and what is not good for you, and you are allowed to make mistakes in that judgment and make course corrections later. While it can be helpful to get an outside perspective, your final authority is you.
PS: I don't iron very often either, but I do find it incredibly satisfying because I'm skilled at it! That skill is not something that can be taken away, even if I choose to stop ironing for the rest of my life.