This simply isn't true. If you bother to dig, you'll find TONS of posts from members who argued that Heyward was simply too big a gamble because they didn't believe in his offense. Was he "capable" of putting up multiple 30/100 seasons while being the best defensive RF in the game? Sure he did it once (close enough, anyway when he was in his early 20s) and it was certainly reasonable to expect him to maintain or even improve on those numbers as he gained more experience. A funny thing happened though - he never came close to replicating the numbers (counting stats or no) that he put up in his rookie season OTHER than in his banner 2012 campaign. His numbers absolutely cratered (.277/.393/.456/.849 his first time through to .227/.319/.389/.708) before his breakout (and likely career) season. Swanson had a similar "mysterious" crater between seasons 1 and 2 (.302/.361/.442/.803 to .232/.312/.324/.636) as the league adjusted to him. Can we expect Dansby to adjust back and blow up in 2018? I don't, but I saw Heyward do it just like everybody else did.
The numbers aren't exact as far as the numbers-crowd is concerned, but they point to the same thing. The league starts to figure EVERYBODY out, and the successful players make the adjustments and continue on and adjust back. I can't tell you whether Dansby Swanson's capable of making the correct adjustments (or what they are with certainty), but I can tell you that Jason Heyward sure as *ell hasn't YET - he hasn't posted an OPS higher than .735 or an OPS+ higher than 109 ONCE since those banner years, and for as much as everyone (myself included) loved him and thought he'd take that next step, there were tons who screamed that valuing him higher higher than Freeman was nuts.
Were we wrong???
SJ24 compares Acuna to Trout - the minor league numbers line up, why is he such an idiot???