Which FCS schools did FAMU play? Exactly. Them beating up on schools that are for the most part lower tier schools doesn't prove anything. Let's look at what happens when decent, playoff quality schools face HBCUs. Oh, that's right, it's **** near a cause for celebration when an HBCU manages to win.
No HBCU has won the FCS title since Jimmy Carter was POTUS. In fact, no HBCU has even appeared in the FCS Title Game since then. HBCUs have done a **** poor job of recruiting, they are getting outrecruited by placed like South Dakota and Montana. Let that settle in. Are you telling me that the typical HBCU has less to offer athletes than freaking Montana? No, but it's become obvious that a lot of HBCUs have no sales pitch besides "We're Black, you're Black too". It's a tradition borne of institutional laziness and arrogance. Guess what? HBCUs have to work for recruits now, they can't depend on the system to drop kids in their lap. The excuses you listed(and they are excuses) just don't cut it. How can you be in the some of the deepest, most talent rich places in the country and NOT be able to recruit whatsoever? You have JUCOs that recruit better than some of these HBCUs.
Even with the kids they do get, I don't see the kind of growth that you see at places like SDSU or JMU. Weight training isn't nearly as extensive, money isn't being spent on additional coaching and support staff.