Every team has a Kapanen? If by that you mean a 2nd line forward, then sure. But you need about 3 of those, and not every team does. You don't think a Team like Anaheim/Detroit/Buffalo could use a 20(ish) goal 50(ish) point scorer? I'll admit, not every team will need him, or value him super highly. But lots of teams might.
Andrew Shaw got a 2nd and 3rd last season. Marcus Johansson got a 2nd and 4th last season with similar career numbers. Ryan Hartman got a 1st rounder. Kyle Clifford and a backup goalie just got two 3rds plus (one could become a 2nd). Kapanen is worth less than Kyle Clifford?
Clifford: GP-53 G-6 A-8 P-14 TOI-11:42
Kapanen: GP-53 G-10 A-20 P-30 TOI-15:58
I don't think anyone can argue that Kapanen is worth less than a 2nd+3rd. I'd argue it's more than that.
Jake Muzzin went for a 1st and a prospect last season. Brnadon Montour went for a 1st and a prospect. Adam fox went for a 2nd and 3rd (hes fourth on the Rangers in time on ice this season).PK Subban went for two 2nds (struggling and overpaid, but the ceiling was a #1D).
It's not an exact science. But it is possible that the right deal comes along. Kapanen plus a little extra could land a top 4 D man.