Futures trading is the easiest but hardest way to make a lot of money in less time, with little capital, because that is the purpose of leverage. And yes, it's quite tempting, because you must control your greed, otherwise, the chances of losses are 96%. The odds are against you, you just have to turn the tables, understand the market patterns and you will start making money.
I don't consider anything as difficult or hardest as easiest, hardest and easiest are oppositely with each other. Trading can bring profit in short term, and sometimes you simply need luckiness to get profit in one trade position but in fact, profit or loss with a trader must be in-net, net-loss or net-profit. Trading is hard and trading with Margin or Futures is hardest trading, so you will have highest risk of losing money with Margin or Futures trading. It's not easy, and surely not easiest.
It's recommended to start with little capital, because when you are inexperienced and start with losses, those losses will not discourage you so much that you give up, over time, you learn to make better entries within your risk management.
I agree. Trading capital must be very small part of all capital you have, and by separating your trading capital into some smaller parts, you will have second, third, and n chances to trade again after losing your previous trading capita part and learn some lessons from it for doing better later with other capital parts.