Absolutely untill there is said to be losses, there would be no harm in winning because all you accounts is stacking of profits but the question is... Are you staying consistent playing even while you have made several wins? Of course it would result to reverse be the case because you definitely won't keep winning.
And to the greeds once a lost would want to chasing recovering which is where I would concur that architects the harmfulness as a result of overjoy and lost of self control because you will end up loosing everything.
I do not know, in my case, I have never had any problems with winning. On the contrary, after I win, I try to stop to keep that feeling of euphoria for as long as possible. At least for that day when I managed to win well. So, I definitely do not see anything bad in winning and I aim for it. Actually, the same happens with losing. One or two losses, and I stop. I do not like playing on emotions.