Re: THEY aren't hiding in shame.
Not all women are comfortable flashing and doing the "look at moiee, look at moiee" virtue signalling when breastfeeding and prefer some privacy. My D-i-L who is no prude, always retreats to the parents room when out, as the grandson is not as distracted and takes less time to latch on, on stays latched on rather than be startled by noises, & generally try to take in everything going on around him.
A lactation room gives them the choice, but if they prefer to feed in the middle of a cubicle farm as long as company policy does not force them who gives a rats.