I also find it interesting that many of the full time DH's are not guys that teams went out into free agency and bought them thinking oh yeah!!!! lets go sign that guy and put him at DH full time!!!!. Obviously that's going to happen with an elite bat like Schwarber.
But when teams do employ a DH 50% of the time or above the higher end of those guys that are inarguably full time DH's are your Giancarlo Stantons. Nobody wanted him to be a DH, he fell into that role.
Lets use the Red Sox as a better example. We want Duran to be a good outfielder somewhere, we WANT Roman Anthony to be a stud outfielder, we want those players to be all stars at their position. We wanted Casas to be a first baseman, if he becomes are DH it will be because he hit his way back to being a MLB player NOT because we wanted him to be a DH.
Does anybody really truly desire Yoshida to be our full time DH? But yet he'd be ok there, and we would be fine with it if an outfielder is traded and/or Casas never comes back.
Teams are not LOOKING for DH's the way that they look for a second baseman.