First off, you'll never get the argument from me: It can't be done. It can be done and profitably, albeit at a bit more stress and time units per day (although this depends on the nature of the trader). To each his/her own
That said, aside from the issue of preference there is the real issue of commissions compounding aginst you. For every spread you pay per unit profit (what ever it is depending on your win ratio and the length of the trade), those pips are not pips that can go toward compounding--they are lost in this sense. Over time the equity curve of a long term trader and a short term trade at one point will start to diverge (assuming both are successful) and this divergence will get stronger as the short term traders is less able to get filled and the 'lost pips' add up even further
If you have a 10,000-50,000 USD account and your strategy allows you to lever up and catch the small moves, then yes, you will make more money in the first few years than a better capitalized, long term trader. But over time 5-10-20 years in the future, the long term trader will come out better in the compounding game, as he is able to get filled better at larger sizes (again less spread to pay due to less slippage) and spread/slippage paid is less per unit profit than with a short term strategy.
In short, once one's equity/capitial really starts to build it is necessary to look toward taking a longer term view. On the other hand, some traders are fine with a base 50,000 USD in their account taking smaller moves from the market.
