The opinions expressed in these forums do not represent those of C2, and any discussion of profit/loss is not indicative of future performance or success. There is a substantial risk of loss in trading. You should therefore carefully consider whether such trading is suitable for you in light of your financial condition. You should read, understand, and consider the Risk Disclosure Statement that is provided by your broker before you consider trading. Most people who trade lose money.
If scaling is done within a well defined and reasonable risk level then there is no argument there. But the strategies that we are concerned with here are the ones that may have an edge but rely on continuous adding highly leveraged (or margined) instruments beyond any reasonable risk level and hoping for a rebound, which eventually does not come. This is exactly what a martingale gambler does before eventually going bankrupt.
