Tintin is from what they call a "half-tamed" world. The civilizations of the Milky Way were almost destroyed a few years before the OTC arrived, and saved at the last moment only by the timely intervention of a heroine and her team of plucky adventurers, including Tintin. Since the Reapers' destruction, it's been more or less constant cleanup. Then the OTC showed up, and stuff got a lot easier.
That's not to say it's easy, by any means. Even with the help of a magical multiversal trade consortium, there have been bumps in the road, pitfalls, and narrowly avoided disasters too numerous to list. Tintin, being a galactically respected journalist, war hero, and general meddler of the first water, helped out with a lot of those, and only rarely in a capacity he had been invited for.
Frankly, he was a bit surprised the vacation voucher they offered him was only two weeks. He thought they'd want him out of their hair for longer.
He checked out the vacation destinations in some detail. Many of them were interesting. Few of them were interesting to him. If he wants to look at pristine natural beauty, there are planets for that in the Milky Way. If he wants rest and relaxation... he doesn't. He'd go insane after three hours.
The only one that really appeals... also happens to be the one that he's terrified of.