I know a number of people who felt very ill indeed, including my sister who was basically knocked out feeling dreadful for well over a week and didn't have any Christmas as a result.
To this, I say 'So what?'. She'd have felt bloody awful if she'd caught flu or norovirus or any number of other nasty winter viruses, none of which require her, by law, to stay at home. Yet they too kill the elderly, the sick and the medically vulnerable. Why should Covid be different, now that we have vaccines and medicines which prevent most people from becoming seriously ill, ending up in hospital, or dying and which for many is either asymptomatic or no worse than a cold?