You have misunderstood that sentence and are running with it. Look, it is NOT all guys that give that info...it's the guys who act like and ass on the boards and treat the women with contempt that stupidly hand over their details so the prospective lady can see what he is really like...call it arrogance or stupidity.
You are quite right in assuming that a hobbyist is a different type of guy who plays. Call the rest of the guys clients, "friends" customers, although client is typically the word used. Very different from a hobbyist.
For the most part I don't have a very high opinion. Maybe been on the boards too much.