I'd like to see a link where Yzerman said he was taking Stutzle too.
That kind of information is so not public and rarely ever comes out. Most everything we hear is reporter speculation; sometimes there's a bit of smoke behind it if there is an actual connection between that reporter and team staff, but they wouldn't have that trust for long if they started publishing it.
Then there's the "connect the dots" speculation by prominent pundits. I said Perfetti was rumoured to be their guy at #4 and that was absolutely a very common story out there before the draft. Doesn't make it true but it was a thing, I remember it clearly. Same with Byfield. There was a lot of chit chat before the draft that LA scouts were split on the Byfield/Stützle debate and that they were leaning towards Stützle. I can certainly believe there was an internal debate, but the speculation about where they were going likely being reporter driven.
Another source is people here who have established they have a credible relationship with someone on the team. They have real info from their source, but 99% of the time their source is not the GM and can't really be absolute in what they're sharing. I'm pretty sure on the Sens board that there was somebody in the know who said they really like Sanderson and could take him at 5. But there was no ranking attached to the name, it was probably an individual reading the room and feeling strongly that Sanderson was on their radar for #5. If Byfield or Lafreniere fell to 5 however, then all bets are off.
If there's any smoke behind Yzerman liking Stützle at #1, I'd wager it's that last scenario. Perhaps it's credible but we'll never know. Also, Craig Button speculated before the lottery that Stevie Y was not shy about taking the best guy for his team and having Seider there was the German connection, so he connected dots and tweeted that out. Maybe Button knew and made it appear like his own thought, or maybe he was just talking out of his ass like everybody else here.
All that to say, don't hold your breath for a definitive link lol