The issue isn't micros, but how the overwhelming majority of them are run. An alliance isn't something anyone can do, and one of the many things you need as an alliance leader is experience. One reason why most micros fail is a lack of experience from its high gov or leader. It's far wiser to just join one of the major alliances for experience for several months, watch and learn from their alliance gov, and if you work hard, you might even become a gov member yourself. Then perhaps you can get some friends to make your own micro. It's not too different from running a startup company; it's just smarter to stay as some bigger company for a few years before making your own. As far as I know, Queen M and durmij have both served as gov members in TKR and Rose respectively, which is why SGM was able to pass the early hurdles of starting a micro.
However, no one in KoS has sufficient experience in running an alliance for themselves. I should mention that the majority of them were Esquire Templar dropouts or left ET themselves because they couldn't meet passing requirements or for some other reason. Josh was banned for attempting to poach, and Blake was apparently removed by AO. As far as I can see, KoS doesn't offer up anything unique as a micro, their IA and Econ are already a mess, with several of their nations not even building correctly (even their gov, excluding the people who weren't raided) and not on the same alliance color. Would you expect this kind of micro to succeed? All of them are low tier as well, so capital is an issue. And this is just the tip of the iceberg.