Gaming

Most bugs don't show themselves right away, once it releases the combined play hours of all the internal testing will be surpassed within the first day. That's why there were 3 (so far) duplication glitches found in TOTK immediately when Nintendo had been looking for that sort of thing all throughout the development of the game.
Let's say 500,000 people download it on launch day and start playing it immediately and each play for an average of 6 hours, that's 3,000,000 hours of combined playtime.
Unless they have an enormous beta community they haven't got anywhere near that amount of testing in on the game.
I'm not saying there's not going to be less bugs than previous games, I do believe them on that because it being a flagship game from Xbox game studios they're going to put a lot of pressure on the team to get it right, but don't take that to mean there's no bugs at all and especially no game-breaking ones.
Keep your expectations tempered and please don't pre-order games.