If parents can't make sense here and my brother wants to buy a car, parents will try their best to help him realize it. Then why don't you stop persuading? Because don't waste your breath with such confused parents. You should remember that you don't expect your parents to give you too much help in the future. It's up to you.
In addition, both brothers and sisters should realize that they should be careful of their younger brothers. After making money, you should "hide" yourself and not expose it, otherwise your brother will miss the money in your hand. Even your brother will encourage his parents to ask you for money to buy this and that. It is reasonable for an elder brother or sister to spend money on a younger brother. But the reality is that your brother is still eating you at home when he is not at work. Can you feel better?
If the above situation is really a true portrayal of you at home, then you should pay more attention to yourself and never be soft-hearted. Because you are soft-hearted, not only will you not be appreciated, but your family will only regard you as a "cash cow" or a tool to make money. That's a bit excessive, but as long as your parents agree to buy a car for your brother, you really need to be vigilant enough, or you will fall into the "pit" sooner or later. Finally, if you can stop it, organize it. If you can't stop it, then learn to "protect yourself", keep an open mind, keep a low profile, and then keep a low profile.