Of course both boxers will do everything to win. We should not stay confident that Thurman will win just because of records.
If others don't know, other analyst thinks that Thurman is already rust. Barrios on the other hand is active and given with a chance that he can win on this fight against the former champion, Thurman.
That's bad for Thurman that many analysts think that he is rusty and that many are siding on Barrios against him which isn't nothing to be surprised, we always want fresh and active fighters more than those who rest. But at the end of the day, we don't know what's going to happen next, maybe the ring rust for Thurman isn't that heavy so we might still see a decent match against Barrios.
Or it's just a good way to bring interest with this fight, analyst are just giving opinions and even they've got upper knowledge about this sport, it's still the fans and the gamblers who will put their money at stake. I still see the advantage from Thurman as he is more familiar and more experienced, having 31 fights and only 1 loss before deciding to rest for some time, while Barrios got 27 fights and also has 1 loss, but in a much lower division.
Thurman decides to take this fight, probably he's aiming for something big.
Winning this one will give him opportunities to take another shot and regain his former position..