Sticking my head over the parapet to say, no, your babies won't be traumatised by Nursery. They'll love it, just as children starting Reception did before it was expected to go to baby yoga, baby massage, baby socialisation, baby signing, playgroups and everything else. They'll be secure and loved and cared for and will find playing with other little people, toys, activities and learning songs absolutely wonderful.
Same way the Reception and Year 1 children won't 'fall behind' and be permanently damaged intellectually - they'll be going to school and attending at the later age that some of the most academically successful countries start formal education and, because they will be ready for it, their learning will explode in that time. The little ones will, I'm sure, be fine when formal, in person schooling is safer for staff and society as a whole.