It should be illegal for exchanges to advertise this feature for new users. I often see different promotions if you join the leverage trading system, like free bonus balance or test balance.
It's easy to say "this" and "that". It's easy to complain when we see things badly.
Now that you said that it's illegal, can you please share here how can you advertise it where you can exclude new members?
Take note that these exchanges are promoting their own BUSINESS, and if they don't need to exclude new users from using this feature because at the end of the day, it's their decision to do futures trading, not the exchange. They can advertise, and you can just completely ignore it if you feel that you will lose money doing it.
I'm thinking of 2 reasons as to why:
1. They want to make money as quickly as possible, and the only way for them is through increasing the number of leverage.
2. They are just simply way too confident with their analysis and entered at a high leverage. Can't blame them since it's their money.

The thing is that it does not work. The only people who make money on leverage are those who are able to manipulate the market price, and those that sometimes get lucky. Leverage trading is actually worse than many types of gambling because the odds can not be calculated. Market conditions could be great, and you may open a long position correctly, but it can be flash liquidated in a second by someone manipulating news outlets. Unpredictable, and because of that much worse than gambling.
It's your opinion and there's nothing wrong with it.
That's why trading is a game of "PROBABILITIES", and with regards to the unpredictable part, that's why there's a thing called "stop-loss" where if your prediction is wrong, you will not lose your money COMPLETELY.
I'm not disagreeing with what you said since it's your opinion, but I don't agree with it as well. I don't see leverage trading as gambling as they have many differences. Yes, you can liquidate in an instant in futures trading, and there's a way for us to mitigate it. In gambling, if you put your money on a single bet, unless you can cash it out early, there's no other way for you to recover the money and you will lose it completely. Market manipulators might make some profit. Lucky traders might make some profit, but also include those professional traders out there that are also making money off of trading.