How accurate is that statement and
did weather also account for more losses than combat
in previous wars (e.g: WW2, Korea, etc?)

My specialty is WWII nightfighting and I can say that, particularly in the
first half of the war, as many a/c were lost or abandoned due to weather (or
collisions in poor visibility) than to enemy action. One night off the top of
my head, a small RAF bomber force had to all abandon their aircraft due to viz
over their bases - something like 5 Wimpys, I think. On more than one occasion,
a Mosquito raid that lost no aircraft due to enemy action had to abandon their
aircraft upon return because there was no clear landing field. Such events were
not rare on either side and veteran nightfighter pilots uniformly considered
the weather every bit as much of an enemy as the other team.

v/r
Gordon
====(A+C====
USN SAR Aircrew

"Got anything on your radar, SENSO?"
"Nothing but my forehead, sir."