We didn't simply lack a 3rd scorer, we needed rebounding and defense also. That's also one series, in the 2nd round. Yes, it was against the eventual champs but we'll need more than 3 scorers if we face most other teams in the West. Offense doesn't win championships alone. We saw that repeatedly with D'antoni here and in Houston. We aren't now the team to beat because we have 3 scorers, we're better offensively but we'll be smaller and depending on our big even more because Beal, Booker, and Gordon aren't going to guard the paint and grab rebounds when the game is on the line.
I'm not forgetting Metu, I'm not counting on him. There's a reason he played in a whopping 6 minutes in 3 games throughout the Kings brief postseason appearance. He's not someone who is capable of keeping Jokic, Giannis, Embiid, AD, or any other quality big from dominating the glass and doing what they please offensively. If we're having to rely on Metu for anything in the 4th quarter then we aren't winning a championship. He's not the #1 or #2 Center on a title team.