Yes, that's what I do. I buy 18 years old FT. I keep them for 1-2 seasons to reduce gray skills. And at 20 I raise whites.
When your striker has 200 (average) attack, you expect a little more from him. And he, then slipped, then not in the mood, then injured for 12 days (playing in his field)
. I understand - it's random, but still.