Well - as tiny babies can't talk, none of us are going to know how they feel about spending most of their waking hours in a nursery during the first year of their life.
Personally when I think what my baby was getting at home from me at 7 months - loads of love and cuddles, daily trips out to the shops, to my mums, to friends, to the library, to the park, and compare that to a baby spending pretty much all day in one room with a nursery nurse who isn't in love with him/her and is having to divide their attention between three babies ........ well, I know what I'd prefer.
I think we all see this from a very adult-centric point of view. Most mums who work enjoy what they do and the day goes quickly. They forget that babies and small children experience time in a completely different way, because the hours they spend in nursery make up such a large proportion of their lived experience. 10 hours a day in one room would seem a lot to an adult. It must seem like eternity to a tiny baby.
BTW - I know babies in nursery do get taken out now and then... into the garden if the nursery has one, around the block, to the park occasionally, but it's nothing like the variety of environments that a baby at home is likely to experience is it?