It's not like selling the stock is going to hurt the company or the stock value.
Not the stock value, but it can certainly hurt the company. Ending Apartheid is the usual example of a social goal which was aided by divestment. Here's a little blurb explaining how that works.
she states that she can't actually write the game, that's for the boys to do
This doesn't happen. Read the page scans in TFA, like I suggested, rather than regurgitating the commentary. She says that she's only creating the design ideas (at the time that Skipper asks this question) and that she'll need Steven and Brian's help to turn it into a real game. That's teamwork, not helplessness.
And of course "it's faster if we help." What do you want Barbie to be here, an anti-social loner? Living in her parents' basement and doing everything by herself is supposed to be better? She's working in a team and her teammates offered to help. At no point in any of the pages shown in TFA does Barbie just sit back and "lets the boys do it."
If you think the system is working, ask someone who's waiting for a prompt.