My quote in "defense" of him is simply saying that he's a legitimate scientist.
but he is not a great one and definitely not a great physicist. astrophysics is one of the easiest branches of physics. the real world changing work is being done in theoretical / quantum physics and that is something that tyson himself does not have a great understanding of, not that he himself makes that clear. his job now is manager as much as it is scientist.
and that is the core of the problem that
some people have with him. his profile and public reach are far greater than his scientific background should merit. that is partially down to his personality and personal qualities. he is a jock in a jock-less profession. he is charming and charismatic to a fault, in a field led by the more socially limited. he is a great communicator and shares a passion for science which interfaces well with broader society. because of these factors (and more) people tend to give his words weight that they often do not deserve even when he speaks within fields.
as a physicist tyson ranks far behind other physicist brehs like professor clifford (so.cal) or henry gates, much less current greats like suskind but tyson's remarks on social issues carry far more weight than any of these in the arena of public discourse.
tyson has a public profile somewhat similar to chomsky but chomsky solely created modern linguistics before he branched out to similarly excel in geopolitics. tyson has not really moved the needle at all when it comes to changing physics and unlike chomsky has not (in isolation) demonstrated a unique talent for social sciences/tech.
in this instance tyson was talking about technology and the contributions of musk. tyson is very much a company man, is a manager (not a scientist), is not counter-cultural and is a public figure whose words influence his position as science-guru and whose position influences his words. in the broadest sense in the scope of his mission to further science (not muddy the waters) it is understandable why he might make the comment that he did about elon's achievements (without mentioning his failures).
i'm sure that tyson who like elon benefits somewhat from a cult-ette of personally, knows deep down that the discoveries that matter will most likely be made by a faceless/lower profile scientist in a lab somewhere (see nuclear fission example) not elon. BUT he also knows that a public figure like elon has a critical role to play in setting the stage for said scientist in pushing the
technological movement forward (science/tech/marketing/industry/investment/production) at all levels and that is something that no faceless scientist can achieve. in this sense it can be said, that despite failures, even elon's BS serves some purpose, in dragging broader society into the future.
do I agree with what tyson said? no, because i am counter-cultural and i am factoring in race.