In general, it is a good idea to use stop-loss orders
But you shouldn't use them blatantly and thoughtlessly. To put it differently, you shouldn't force yourself to use them just because it is the right thing to do.
Sorry dude, who told you it's the right thing to do? I trade handsfree without a stop loss. The key thing in trading is money management (MM). Make sure your lotsize won't overwhelm your capital while trading, and don't go in all as seen any trade as infallible, especially forex trading
In general, it depends
Indeed, no one is forcing you to use stop-losses since it is your choice after all (and your money). In other words, if you don't use them, I'm cool with it (more power to you). But that's not my point at all. What I mean to say is that if you are forcing yourself (note the reflexive pronoun here) to put a stop-loss and even if it is technically required (yes, this is the part where it depends, e.g. when you are shorting), you'd better not force yourself as somewhere down the line, you will revolt and then the market will instantly take advantage of you (and your money, yeah)