Xenia's statement was quoted out of context in the OP.
She has since clarified that it was only in relation to "special jobs with 1-2m earning potential". It is not cloudcuckoo land because I happen to work in such a City firm (though not on that career track anymore). These are jobs where a premium is built in the remuneration to compensate for the fact that the firm (or more accurately, the firm's clients) own every minute of your free time. There isn't a clear demarcation between personal time and work time. This intrusion is not acceptable to many people (as many on this thread have expressed) and so better that it is the Xenias of this world who do it, and not me.
But for Xenia to state that it is unacceptable to call in for a child or cat or spouse's ill health or whatever is a just a statement of fact. It is neutral and part of the job spec. Xenia has every right to make this observation, a perspective I am interested in.
Family or even human rights don't come into the equation. If you don't play by the unwritten rules, it is career suicide. In reality, even such firms will have some degree of flexibility. My previous bosses have taken days off when the nanny was sick etc but the difference is they NEVER took it during a crunch time at work (when they were key to a transaction which was about to complete to a tight timetable). In a way, it is easier to rearrange your life around a personal emergency when you are actually on 1-2m, rather than with the potential of earning it but not having made it yet.
The difference is that a person in this job cannot switch off and say, oh, child sick, I am at home, don't bother me. The calls will still come. I remember a transaction in which we were in the office on a Sun and made unscheduled call to a Luxembourg lawyer on his mobile. We were so grateful to be able to reach him and then halfway through the conference call, he said he had to duck out for 30 minutes because his family and guests were waiting for him to start the BBQ! And wait we did. But that is why he is paid the big bucks. And no one thought to ask why he wanted to have children if he allowed work to intrude into his personal life to this degree.
The one time I had to stay home to look after my feverish dd was actually quite easy. She just lay on my lap drifting in and out of sleep, whilst I wiped her brow and offered her water and Calpol periodically. I could easily have been online working from home, impossible if she was bouncy and well.