I’ll say this.
A lot of people farmed Hoda and Wampa based on RUMORS of an incoming Jedi Luke event. Who knows what/if the event would require not knowing what CG is planning, but that’s the game.
For Chewie, yes it’s extremely difficult, a ton more than previous legendary events. It requires a lot of investment into bounty hunters to even have a remote chance of getting him at 7 star. From what I can tell, a lot of the people that did manage to get him ran teams that didn’t include the newest bounty hunters (Aurra, Jango, Embo). ZBossk and Dengar appear to be key, Boba Fett, Greedo, and IG88/Cad Bane seems to be the general consensus, and some luck with really good mods. If this event were easy, Chewie would be everywhere, but it’s hard, so it makes getting him more exclusive, and there’s nothing wrong with that.
If you look at previous legendary events, some have been a downright cakewalk, like Emperor Palpatine. There aren’t that many players without him, and because he’s so common to run into, he’s not very special at all.
Also regarding having to farm bounty hunters. That faction has been largely ignored until a few months ago. Before, you’d only have them if you a) liked Bounty Hunters b) credit heist c) territory battles/TW. CG have been adding quite a few events that require bounty hunters to make them more of a playable faction, so to say they’re useless no longer has any grounds.
The Chewie event being so hard only makes it much more rewarding if you do manage to unlock him, even if you can only manage 5 star.