Question is, do you think another manager would play them outside of their preferred position and keep playing them there for so long? If Theo had gone to any other club, he'd have been played as a striker because his strengths and weaknesses are that obvious.
Would any other manager play Defoe or Owen on the wing with the intention of playing them as a striker years later? How else can Theo prove his position as striker besides scoring goals? This is a very Wenger like problem and he's unconventional because I can't see any other manager trying this sort of thing. Besides Henry, has he successfully developed any other strikers like this?