@tpr In other sciences, empirical data alone is NOT proof. Indeed, one is strongly cautioned against correlation/causation fallacies and the like.
Engine play is necessarily sub-optimal. If the path to a forced win is exactly one only winning move at every juncture for the first 30 moves, a current engine will only find it by blind luck, and usually won't find it at all, since the "payout" comes waaay outside of the search horizon.
You also continuously neglect to mention an aspect of engine play that is consistent with chess being a forced win for White: the stronger the play, the higher the proportion of decisive games that go to White. In fact, the proportion of white to black wins grows NON-LINEARLY with playing strength; for example at an Elo of 3000 the ratio is about 2:1, but at 3400 it increases to about 6:1.
Given the impossibility of engines to find the optimal line at every play (the search horizon falls well short of checkmate from the opening position, and expansion does not extend every possible line; the vast majority or either pruned or not extended, in both cases due to imperfect shorthand methods for determining how "promising" each line is), increased draws are also expected with stronger play. All current tree search methods are based on some variation of a minimax algorithm, which tends to produce equality if it cannot reach an end state. Thus, looking at engine results can inform the question; for example it essentially eliminates the possibility that the initial position is zugzwang; but it cannot ANSWER it.
I must reiterate for approximately the 100th time that my OPINION is of concordance with your OPINION, that chess is a draw. Likewise, most of the experts you have mentioned clearly state that their view is an unproven but educated opinion. For example, Fischer's quote on the matter is not as you state it; as if it were a foregone conclusion. His most detailed statement on the matter (in his interview with Yasser Seirawan at the time of his 1992 rematch with Spassky) was, "It's ALMOST definite that the game is a draw theoretically." On the other hand, Pal Benko has written of Fischer that "he believed—as have other players and theoreticians—that White's first-move advantage, properly exploited, should amount to virtually a forced win." I take Benko's statement as hearsay and unreliable, but use it here to demonstrate that perhaps you overstate Fischer's confidence in that conclusion.