Earlier quoted context omitted.
Because it was clearly botched marketing material rather than a coordinated plan. Hypothetical: somebody asked an engineer what kind of encryption Zoom used, the engineer responded somewhat vaguely and the marketing person heard "we encrypt between endpoints" as "end to end encryption" and then nobody noticed when reviewing the text.
Yeah right, oops
If zoom was truly trying to market themselves as e2e, why is this only buried in one document rather than shouted from the hills?