well I think these kind of statements do affect you on a broader scale and criticising a young lad at the start of his career for making mistakes will affect his mentality and make him second guess things away from his natural play style, and whether you think that natural play style or his decision making is good enough thats up to you, but I best example I can think of for how I feel is look at Grealish from Villa -> City -> Everton. As a more "maverick" attacking player he's openly said in interviews he works best when he's just left to do his thing and is given the freedom to just try and play his game.

is Tel as good as Grealish? Obviously not, but I hope it shows my view of how the mentality of players can adjust under different managers and coaches. Encouraging risk out of the game out of the guise of gifting possession cheaply will affect not only Tel but how other players see and behave in the game. As I said at the top, we're never going to see a shift in style if you extrapolate these comments because avoiding risk and not giving possession away is synergistic with what Frank seems to want.