It definitely tried, but Syrlya doesn't get the moment to explain further before he regards Lambert's next statement with confusion, furrowing his brows.

"It is. But the dragons affect everyone, and I am only one Sylvari!"

If he was told he would be fighting Zhaitan alone, like Trahearne's Wyld Hunt... he probably would have also assumed it impossible. "It is a war. The other races had a hand in confronting the dragons before the Sylvari even awoke, our very world depends on unifying ourselves."