Let's do it this way. I'll not use '18 because of limited evidence.
'13 Miami picked #2 (Jordan) Next QB taken Manuel at 15. Miami could have traded down (.MAYBE). To get Manuel?
'14 Miami picked #19 Bortles was #3 Not a future top 10 QB and a big cost to move up.
'15 Miami picked #14. #1 was Winston, #2 was Mariota. Neither top 10 and a big cost to move up. No other R1 QBs.
'16 Miami picked #13 Goff went #1, Wentz #2. Next QB was Paxton Lynch at #26. Again, a big cost to move up, and I have serious doubts Wentz would be too successful in Miami
'17 Miami picked @22. #1 was trubisky, #10 was Mahomes, #12 watson.
What would you have done? I know it's easy in hindsight, but who on that list would have been successful in Miami? Pay particular attention to years '13, '14, '15, '16. Not real good years for QBs. It is stretches like that that make 'just try' a rather weak argument.