Hear hear nooka, excellent post.
I fact I really wish people would separate the whole bonding issue from the equation, as it rarely has anything to do with it. I had no trouble bonding with my first dd, but returned to p/t work quickly. It's got nothing to do how much you love your child or enjoy their company - you can feel those things 100% but also want to work. And as you rightly point out, dads usually seem to be left out of the debate!
The bottom line is that we should focus on good parenting, as opposed to poor parenting, which have nothing to do with working - it's possible to be a brilliant parent as well as working full time, and it's possible to be a very poor parent while not working. I have been a teacher for many years and I honestly think if there were a clear divide in outcomes between children of working parents and children of SAHP, then it would be really easy to spot! And it isn't. I have known clever, engaging, positive children from homes where the parents work and where there is a parent at home, and children who are not very clever, or have behaviour issues,from both types of home as well. In fact, the most extreme behaviour I ever came across was from a child where the mother had never worked at all since about age 18, she was at home 24/7, but it didn't produce great outcomes for her children! The whole issue is far more complex. If the parents have a good relationship, and are good role models for their children then the children are likely to do well.
I have no issue with a parent staying home if they can afford it, and if as a family it suits to have a parent at home. But let's be honest about what it is: it's a decision that one parent wants to do that. It's a massive leap to then suggest that it somehow makes things 'better' for the child. In fact, the OP is very honest that she can't face the idea of going back to work. She's not saying it would be bad for her child, and in fact they aren't even deciding for her to continue working on 60k while her DH gives up his 30k job - she is saying she wants to stop working. Which is absolutely fine if as a family they agree, and realise that it's a decision which suits her but which won't mean that the child will grow a different personality, or walk 3 months earlier, or achieve 10 more GCSEs at school!!