Take from it what you will - but in my opinion the woman in particular had 10 months to get into a suitable routine for breastfeeding that doesn't involve an hour off each day and doesn't impact co-workers. So yes I do believe she should have tried to be better prepared or strive to be better prepared whatever suits.
Why do we assume she did not? I do agree with your point regarding planning - and I think most women (and especially working mums) do. You are making a mistake though that many make, including myself until I came face to face with it, which is deciding to breastfeed and when to stop breastfeeding is not one persons decision but two. The mother and the baby.
I went back to work after 8 months with number 1. I planned to phase out breast feeding at around 6 months. While trying to phase it out I came down with mastisis and got very sick, as well as antibiotics one of the cures is to keep on breastfeeding. I made 3 attempts to phase it out and every time got sick finally when my body seemed to cooperate the baby would not and we could not get her onto bottles. So I went back to work still breastfeeding - despite my best plans.
With no. 2 I went back to work after 20 weeks and started phasing out BF much earlier (after 12 weeks) due to my previous experience and after a week the baby and my body cooperated and ironically I stopped breast feeding much sooner than necessary. However when I went back to work baby number 2 got sick and I missed much more work than I ever did with baby number 1.
Number 3 is due in a week. I will breast feed, I will go back to work, I do have a plan, whether it will come to fruition is up to many factors and not just me alone.
In short - your point is correct - the mother should plan how to manage returning to work, but I firmly believe a very high percentage do and despite best laid plans baby and or body might not cooperate.
To the pump point, made by another poster, definitely viable option, its what I did with baby no. 1 when I went back to work but a pump takes twice as long as baby to extract milk. If you can get to baby (which the lady in the OP post seems to wish to do) its much more efficient.