Quoting: Skyraider112
https://www.hockey-reference.com/players/k/kakkoka01.html
https://www.hockey-reference.com/players/p/puljuje01.html
Your argument about points is moot. Puljujarvi only reached 25 points this season and that was playing with McDavid for the vast majority of the year. Kakko had 23 in his rookie season. 25 points isn't a benchmark for determining good players.
Feel free to compare their advanced analytics. They are very similar in a number of categories but Kakko is a bit higher in pretty much all of them.
You could easily argue that Puljujarvi would make the team over Komarov, but not over Kakko
You're right, 25pts is not a benchmark to determine a good player but the argument was that Puljujarvi can produce at an equal if not higher level than Kakko. So when you look at the defensive acumen bet on Puljujarvi over Kakko.
Pick your advanced category of choice, and he’s among the best on the Oilers. In terms of expected goals percentage, he’s second only to Connor McDavid, and just barely. By the percentage of shots that go at the opposing net the top four goes McDavid, RNH, Puljujarvi, then Draisaitl. Basically everything that’s a percentage (using not just offence but defence, too) shakes out well for him.