Assuming everything will come in time is also a risky proposition when some games only have a vague "2019" release date; especially if we haven't seen a single second of gameplay.
Correct me if I'm wrong, but aren't Pokemon and Animal Crossing the only confirmed 2019 that we haven't seen gameplay of? And those games don't seem especially likely to miss 2019, since they are likely to be the year's biggest system sellers.
I know we haven't seen any footage of Metroid Prime 4 or Bayonetta 3 yet, but we also have no release date for either game, and I think most people in this thread would argue that 2019 could still be an excellent year without them.