Event tickets should be tradable.
Given how Dragon Chests can be traded, and they’re a source for Dragon Tickets I see no reason why the Tickets shouldn’t be tradeable.
It would give every player that dislike RNG items the ability to buy them with money without RNGs (that others took in the process) by paying a price marked by the demands of players that went through it.
I know there are some sets that I wouldn’t like any weapon because they don’t fit my characters, and if a ticked droped to me I wouldn’t know what to do with it.