Well, we did have a need for it but we just chose to ignore that need. Something like 30,000 people died every year from the regular flu in the USA alone, before pandemic. Social distancing (and masks) would bring that number to close to 0.

So if we're going by metrics of, we'd like to save 30,000 people every year, we absolutely had a need for social distancing all this time. But I get it, our society has a large tolerance for mass death, so in that view, we "didn't have much need for it". But taking that view we still don't have any need for it.

Obviously from my perspective we've had a need for it this whole time but just blissfully ignored that fact.