Experienced traders often suggest that newcomers should refrain from trading. However, this does not imply that they should completely avoid it. What they imply is that beginners should invest their time and effort in learning and gaining experience. This may take a while, but it will be worthwhile once they embark on their trading journey.
Yeah, I don't think any 'expert' is saying that a newbie should never start trading at all. Even outside of crypto, most newbie introductions to trading are related to managing emotions and being familiar with how the market works, using the money you can afford to lose regularly. That is not rocket science. As far as I can see, most new threads related to trading also ask stuff like trading indicators, trading bots, etc which is probably why some people get the impression that those tools are not helpful for traders unless they are experts. But if your definition of an expert is one who can make a profit regularly, it is impossible to become one without making any trade at all.
I see a lot of posts replies that discourage trading.
Which one? Maybe we can see what kind of posts led you to the conclusion on your thread title. I believe most advice shared on this forum is quite solid (unless you're reading posts from people who clearly never trade). Stuff like don't use a bot if you're not familiar with it, don't overcomplicate your indicators, don't take a loan for trading crypto, etc. But that's as far as they can help you. As long as you manage your risk properly, you should start trading if you want to make a living out of it. Not to mention managing emotion is also important, which is why you should not expect to become an 'expert' after a week of reading a chart on a monitor.