Silva joined La Real this summer from Manchester City.
A former Las Palmas player like Silva, Valeron told AS: "David is still at a very good age to continue playing. I was very surprised that he ended up at Real Sociedad. No one expected him to return to Spain and La Real. I don't think anyone would link him to that team. But that decision shows a bit what he is like.
"He is looking for something that he feels. He felt that his place was that.
"I think he really enjoys playing. But it is true that at a time you will probably bet for the pleasure of playing. He has rejected very important offers from big clubs, foreign leagues ... to go and enjoy football the way he understands it. And helping a team like Real Sociedad that has a very clear proposal. He knew that he would have a good time there, that he would be comfortable."
Valeron is Depor B coach this season.