Losing is part of successfully trading. If you treat losing as part of trading then you are an experienced trader.
Sounds like a gambling philosophy, still could not ignore its meaning. One of the basic thumb rule of trading is we cannot prevent losses but we will be able to cut the losses early when it will be very small. Yes, losses also a part of trading.
It isn't necessarily a "gambling ", and I agree with OP. In his annual reports, Warren Buffet always says Berkshire Hathaway can and probably will lose money. You always have to expect it, because no one knows what asset prices (stocks, bitcoin, anything) are going to do. Everyone might hate taking losses but they're definitely to be expected. I've taken plenty.
I suggest that this is a must read thread. There are lots of successful millionaires that first lose their money or properties before they become successful. You need to sacrifice something in order to gain something you want to get. Losing money is part of the risk in trading. You might not get it all but at the very least you have tried your best in order to gain something. Every day you will learn something new and you can become an experienced trader if you keep doing what you want.