Though often used pejoratively, there’s nothing wrong with Armchair Engineering. Covers a long list of vital activities such as innovation, research, learning, planning, ways and means, problem solving, consultation, calculation, budget management, ordering, organisation, documentation, communication, risk assessment, and reviews to name but a few.
Though some dislike the idea, engineering involves a lot of thinking! Unless of course someone else provides the words and music, in which case one risks being labelled as an artisan, not an engineer!
And the armchair may be the only tool available to those who are ill, short of time, or don’t have a workshop. They are not second-class citizens.
Rest and recuperation are important too.
Dave