Very good point
skip spence.
Although I don't consider Thraundil to be wise I don't believe him to be stupid. I'm sure that as soon as he heard about Thorin reclaiming the Lonely Mountain he would empty his hall, which cannot be more than 1000, and set out for Esgaroth.
I thought that his lust for the jewels was completely unfounded. He treated Thorin, chief of Durin's folk, as no more than common vagabond, and then when all the dirty work is done he is at the slopes of Esgaroth with an army ready to take the mountain by force if neccasary and he didn't give an ounce of help!