Because trades involving Rocket Richard winners in their early 20s who actually play a two way game... don't happen. It is unfathomable.
Eichel literally got traded because the bridge between him and Buffalo got nuked from orbit and then they nuked the ashes again because that just wasn't good enough the first time.
Gretzky got traded/sold because Peter Pocklington is a cheap sack of shit who couldn't afford his team.
Outside of some massive event, guys like Auston Matthews do not get traded. Your choice of Seth Jones was not a very good one. He's not a franchise D-man just because he got picked in the top 4 of the draft. He was traded 1v1 for Ryan Johansen who was a very good player but not anywhere close to the realm of Matthews. Not even at Johansen's peak. Johansen's best year in the league? He had two more points than Auston Matthews had as a rookie... while playing 150 more minutes (1599 for Johansen, 1446 for Matthews.)
Offers are made for these kind of players all the time... but without some inciting event, they are not ever moved because the price to make it happen is so high it would kill the acquiring team. I mean, Eichel is basically worthless for this year and there are very serious doubts about his effectiveness going forward... and he got dealt for Tuch, a high draft pick in Krebs, and another high pick and that was viewed as a bargain basement price.
Since when is Matthews a 2 way centre? If he was this, why is it he isn't out there killing penalties like the top 2 way centres in the league? You want your best players on the ice in all situations... and Matthews isn't there killing penalties in the trenches. Why is that?