I don't think that the purpose is all that mysterious. Throughout moderns times, scientists thinking 'outside the box' have been ridiculed from their professions. It is as simple as that.
The same holds true for the dirty comet theory. There are some that don't believe it, almost none that will submit it.
What dirty comet theory? Astronomers know that comets aren't simply made of ice; they have other things mixed in -- things that end up as meteors (cf, the Leonids). And, as for "thinking outside the box," as long as the evidence supports a theory, other researchers will give it a fair shake in the peer-review process. If it doesn't cover the evidence, don't expect anything but ridicule. Methinks your "electromagnetic gravity" theory falls into the latter category.