SBF Because it leaves open the window of hope that some parents won’t take a hard line, and if they do take a hard line it calls into question whether their actions come down to Watchtower loyalty or lack of parental love.
Yes, this causes so much pain and resentment.
Strictly speaking she's not wrong though, at least back then. Parents that converted in the 70s will have done so on the understanding that you weren't required to shun family, so even without his wealth she may have maintained contact.
There's so much inequality though: A wealthy child who financially supports their parents will be made an exception, due to the "essential family business" get out clause.
But most of all, being a woman, there's no chance of her having to give up privileges due to contact with a child. It's conceivable a pioneer may be called to account for it - but in my experience if it's a long time pioneer who does the congs heavy lifting in terms of hours, that's unlikely.