NO. Trouba just isn't that good, he wants to be paid like a #1 defenseman, whereas he's a middle of the road 1st pair guy - has never received a single Norris vote, his metrics say he's good but not great offensively and average defensively, and his PP scoring has less value for a Flyers team with Ghost, one of the best PP QBs in the league, and Sanheim, a budding offensive star.
Trouba as a one year rental is worth no more than the 2020 1st rd pick (top ten protected), just look at the Harmonic and Hamilton trades, both players were cost controlled (Harmonic with 3 cheap years and Hamilton with 4 RFA years left).
No different than baseball, with guaranteed contracts and a hard salary cap, you can't afford to overpay for talent and remain competitive.