It can be. That doesn't mean it is.
Going private allows a company to focus less on shareholder value (its legal first obligation as a traded company save for a legally defendable company charter that counters this in any way, which is rarer than it should be). That theoretically allows it to focus on growth or market entrenchment before profits, and take risks otherwise you wouldn't be able to take without risks of lawsuits.
It allows more freedom in restructuring and financial business decisions. The downside to that is when a vulture capitals like Bain or Ichan comes along, their motives are to extract as much profit from the 'asset' as possible for themselves regardless of the outcome to the business.
It stands in start contrast to venture capital firms that actually care about success. its usually obvious which one 'investors' are. If they're willing to put up money and take risks with you at the start, they're venture. If they're coming along after you're successful but struggling with a 'grand plan' to restructure and improve your business if you accept their money (and hand over way more control than you should), they're vulture.
All of that is just my observations of course. I'm open to counter arguments.