Disagree
Though I too wish Luke would have stayed here, I can also see his perspective in leaving. Say he sticks it out here...
Best case for Luke, Adrian moves on after 2021 season and Luke has up to three years to potentially be the starter by beating out two freshman project QBs.
Alternative outcome: Adrian uses the Covid waiver and comes back to be the starter in 2022 as a fifth year senior. Luke's likely starting opportunity window drops to two seasons and the freshmen project QBs (presumably) get more even with practices and seasoning. At that point (2023 season), Luke would not have been a full season starter at QB since his senior year of HS in 2018. Add into this puzzle the assumption of not taking transfer QBs in today's transfer happy era.
Though the fan in me says to stick it out and earn the starting spot, the realist in me understands wanting a better opportunity if one is available. Seeing how many times some of my friends switched majors and flipped between colleges, I can understand a 20 year old changing his mind on more than one occasion.