Wow, justsayin' -- talk about Mommy wars! Sheesh. Are you really that closed-minded to think that being a stay-at-home mom is the best and the *only* way for everyone? Every child and every family is different. So saying that daycare is "not the best choice if you don't have to" is just your opinion -- not, by any means, a fact.
My son was in daycare literally right down the hall from my work from 3 months to 17 months old -- I saw him every day for lunch and popped in to breastfeed whenever he needed to. And he had a bunch of best buddies before he was even 1 (even if they did nothing more than parallel play, he *definitely* enjoyed being around them and felt loved by his teachers). Granted, I was still *devastated* to not be able to be with him every second of the day -- but I had no choice financially and had to bide my time until I could figure out how to make the work-life balance work better for our life! But looking back, I think daycare really helped him learn how to interact with -- and just be around -- other kids and adults early on. Now, at 5, he's a very sociable, outgoing boy who's always eager to find new friends and explore wherever we go.
But I chose to start working from home part time (during naps/at night when they slept) once I got pregnant with my daughter, who's never been in a day care/school setting until preschool (or so much as had a non-relative sitter). Now, at 3, she's clingy 24/7 and can barely stand to be away from my side for a second without being petrified. And I can honestly say that I feel like I had *far* more quality time with my son when he was in daycare than I've ever had with my kids here at home (where the day has come and gone and I've been so busy dressing/bathing kids, serving meals/snacks, doing hair, finding lost toys/cups/books/shoes, straightening up, refereeing fights, wiping tushies, throwing in laundry, yada, yada, yada that there's little time for real *quality* time).
There are pros and cons to every situation -- both day care and staying home. We all do what seems like the best arrangement for not just ourselves, but our children, who each have their own individual needs and personalities. And even if the Obamas' kids aren't entirely "unaffected" (by their high-profile dad's political career *or* their mom's very admirable work history either) no doubt they love and respect both of their amazing, role-model-worthy parents.