It is not necessarily about scalping and what do you mean by conquering forex market? I think that it is better to trade longer than scalping with bigger lots. Thus you will be more responsible for your decisions and they will be more accurate and safer.
We need to realise that scalping isn't the only strategy in forex trading. I have been using day trading strategy for a while now and it has made me more profits than scalping ever would . Moreover to become a forex market conqueror a person should be a smart trader not a static one.
Scalping can be really profitable for some traders, but I think experience and knowledge about overtrading and other things can influence chances of success. I know a few people who hate scalping and therefore they use different strategies and other strategies while my other friends swear by scalping and they do very well. I think it all depends on various factors.