I think that this discussion has been a bit of an eye opener for @SayItLikeItIsLetsKeepItReal , as suggested by her later comments.
The question of 'how do you do it well' is dependent on how you define 'well'. And that is where you run into trouble, because there are lots of methods of doing it well. In terms of being there when your children are ill, there's:
- Having a flexible enployer who provides good carer leave
- Sharing the load with a partner/husband
- Having relatives nearby who are able to support you
And some of us do not have any of those things but still need to work, so we struggle on.
In terms of missing your children while you are at work, that depends entirely on your personality. When I went back to work after mat leave, I absolutely did miss my children - but they both settled into nursery with such complete ease. I was lucky to have a very good nursery with virtually zero staff turnover, family run, open and transparent. My kids are now adults, but they still greet their former nursery workers when they meet in town - and yet that had no adverse impact on their bond with their parents. As a working parent, what you end up doing is putting your children first when you aren't at work and that is no hardship: family meals, bathtime, reading stories at bedtime - it's all a joy. And of course there's weekends.
I really thought I could be a SAHM when I first went on mat leave. That lasted 4 months and then it became intensely lonely and stressful. The mums group I was part of were all going to be SAHM and their conversation was so, so limited. I wanted people I could discuss the things I was interested in with. They only wanted to talk about all things baby. I was incompatible with them. When I went back to work, I got all the adult company and conversation I needed.
Other people are temperamentally more suited to being a SAHM, and have better groups of fellow mums around them. The dice fall as they will.