I think if you just read the Guardian piece on childcare then you'd think nothing much of it, because it's written in a fairly uncontentious way. But the piece in the Times is much more irritating, and some of his other work is really fairly appalling. Like his contention that ADHD is caused by maternal stress, or that all you have to do with Alzheimer's patients is agree with them. Articles backed up by research which on further examination do not say what they purport to say, and where Mr James has handily written another book to plug whatever therapy he is suggesting is just the job.
So no, saying that consistent loving care is best for babies is not contentious. There are a whole load of other reasons why Mr James should not be taken seriously. Parents wanting to look at the evidence (such as it is) should look at the original research not the writing of someone with an agenda (or not in isolation in any case).
Personally I found that my mental health did a whole lot better if I didn't read any gurus at all, but chose as far as I could based on our family circumstances from the options available to us, knowing the needs and wants of my family. We've had a nanny, nanny-with-a-baby, nursery, SAHD, SAHM and childminder over the years. They all had their pluses and minuses, mainly based on the personalities and work ethics involved.
My bugbear with a lot of this stuff is with the overemphasis on the first few years. In my experience it has been as the children got older that they have needed our support more, and juggling primary school with work was way harder than when they were younger, and yet this seems to be totally overlooked, so there is idea that you give up work until your children go to school and then pick up your career then (ho ho). I think that parents need to look at the long term. It's not just the first five years that are important.