You can't ignore losses in Forex trading. Before moving forward to a new trade, go through your trading journal, find out the mistake you made, change your trading plan so that you can minimize your trade losses.
There's no connection between leverage & tight stop loss. Stop loss depends on your analysis. The more leverage you have, the more chances to bring profit/loss.
Bank forex traders only make up 5% of the total number of currency traders around the world, with other retail forex speculators accounting for the remaining 95%. But even at that, these few bank traders account for 92% of all forex volumes globally.