Given the content of your first remark, I'm strongly inclined to suspect this use of the explicitly masculine pronoun is first-degree trolling.
This serves as a counterexample to your point, because as statements go, it would be simply be factually (rather than politically) correct to have said "they" rather than "he", unless you really do hold an expectation that all conference speakers are male. In other words, neutral language is more rational, not less.