For a site with the kind of traffic Reddit has from as many locales as reddit has, 10 people wouldn't even be enough to comfortably cover basic SRE requirements. Forget new features, they would literally spend all of their time just barely keeping the damn thing working. Their would be no admins. No Secret Santa, nor any of the various many things Reddit currently has that requires the support, and more importantly trust, that comes with a full time employee/contact.

Sure, could they do it? Absolutely. But I'd bet a large sum on money that they'd do so poorly.

Also it's important to note that whether you like it or not Reddit is and always has been a business. Being profitable isn't the most important thing right now for reasons, but somehow i doubt investors would be ok with them just punting on the issue forever. They rightly expect a return.