OK, good for her - she has found something that works for her. BUT, she is not single - she is part of a family unit for which she is also responsible. This is something she needs to negotiate with her spouse. It only benefits the family if it works for both of them. Otherwise it is a source of friction pulling the family apart.
I agree with the bit about overloading kids with activities. One of the most under-rated things a parent can do with kids is cook dinner, sit down at a table and eat dinner (no devices allowed) We tried to do that at least 5 times a week.