I washed my hands before holding a brand new baby in 2018. I thought it was a perfectly normal thing to do
See, 20-30+ years ago this wasn't normal at all. People came round and held my DC (3 in all) but no one ever EVER came into my house and volunteered to wash their hands before holding them at a few days old (any of them) and I didn't even think of asking them do to so!
And you know what? None of them (DC) came to any harm. As long as people were 'clean enough' (which I assumed most of my friends and family were, because I knew them well enough!) then that was enough for me. I never once asked anyone to 'wash their hands' before holding my DC!
I'm a bit worried how the world is going these days. Covid is one thing (and even with that, most of us are going to be ok if we catch it) but even without it, babies just need to come into contact with normal friends and family, with their normal day-to-day germs like coughs and colds. That's how you build resistance!
One of my DCs had loads of stomach bugs between 2 and 4, but never had any other issues after that. The other two had loads of coughs and colds (and ear infections, in the case of one). But they didn't catch those by people not washing their hands, and they have grown up to be perfectly well with no issues.
I know I'm going to be shot down by the hygiene police, but I honestly do wonder how the modern parenting world know how we, and our parents' (so, their grandparents/great-grandparents) managed without any hand gel, anti-bac anything or paranoia about who we let though our doors to hold our children! 