I am, unsurprisingly, inclined to agree with BDL – the conspiratorial silence of a handful of military personnel in a military dictatorship is eminently more believable than the connivance and 100% silence of probably tens of thousands of people in a liberal democracy with freedom of expression and freedom of the press (who were indeed present), not to mention an unfinished ship being miraculously finished and travelling back in time to take part.
The pilots probably genuinely believe that they hit it. Bad weather, stress, wishful thinking, having just had your oppos blown out of the sky, high approach speeds, similar-looking silhouettes, oblique approach angles, not wanting to disappoint the folks at home, et cetera. If there genuinely was no gun camera footage, then the only people that would have know for a fact if there was a hit are those on the ship, and almost everybody in the world accepts what they say.
It is, indeed, possibly one of the most contorted conspiracy theories since Elvis rode Shergar into his UFO at area 51 and went for a day trip to play golf at a Nazi base on the moon with Lord Lucan. Two very stressed fast jet pilots said so, and I believe them against all evidence to the contrary, because I really really want to.