Partly agree. For newbies and beginners, crypto trading is not a good hub for starters, but for some experienced one, they can take advantage of its volatility and marginal movements. I hate to say, but I loss more than what I gained but thats how it works. The question lies is how confidence you are and how big is your risk apetite cause sometime it can give you good profits with a right timing.
It's not easy to become "experienced", just because you traded a lot doesn't mean that you will get better at it. People even might start losing money when they get more experienced, because they start getting cocky.
To be fair, OP said this is for beginner traders, not newcomers to crypto in general. Traders, regardless of their experience with crypto itself, have to start somewhere, and these practice accounts are probably as good a jumping point as any. Who knows, they might be dissuaded by losing their fake money making bad trades, preventing them from losing real money in the future lol.
I personally wouldn't recommend trading either, but can't deny that some people do make money from it, and that some others are even consistently successful with it. The odds are generally going to be against you, but there's really no way to know how well you'd do if you don't try (hopefully while minimizing losses).
I know, and I'm saying that maybe some users would better rethink their decisions to become traders, it's extremely risky and lots of people who come to crypto don't have any sort of safety net, meaning they shouldn't invest much because they can't really afford to lose it. And all the time spend on learning to trade would be better spent on developing skills that can help them lend some real jobs.