Yes, absolutely. And a couch potato is going to be left wheezing, aching and absolutely exhausted by the first week of Couch to 5 K, just as someone who’s let their social fitness go for years will be drained and probably be made to feel uncomfortable, maybe horribly uncomfortable, at their first coffee morning or night class.
Both may go home thinking ‘Well, not doing that again!’
And that discomfort and exhaustion will be the same whether or not illness, difficult circumstances, agoraphobia, lockdowns etc etc or just disinclination was what caused the lack of fitness or social fitness.
But the discomfort isn’t a reason not to try to retrain your social muscle, just as we know that some basic level of physical fitness is needed for health, even when an illness or disability makes exercising very hard. Regardless of whether or not we’re perfectly happy with no other person in our lives, or never getting off the sofa, our mental and physical health is better with some form of social and physical exercise, however minimal.