A super-majority of the UN says you're wrong.
> As of September 2025, the State of Palestine is recognized as a sovereign state by 157 of the 193 member states of the United Nations (UN), or just over 81% of all UN members
Quoted that from Wikipedia because googling it even a little seemed a little hard for you, so happy to help :)
Neither does Israel, btw.
Why? Because if they said what their border are, they would be already implicitly renouncing to anything outside them, or at least recognising that they don't have a right to it. Why set limits to your ambition?
That's also the reason why they never annexed Westbank and try to get rid of the people living there.
But Israel also doesn't have an incentive to define a narrow permanent border and therefore renounce more territory acquisitions. For example, illegal settlements outside the internationally recognised borders are defended and taxed as territory of the State; their residents are considered residents of Israel.
So the solution is to keep vague and say that borders are "contested".
> Just try to enter by car, you will realize there's a border.
If you mean "Israel borders are wherever they shoot families on cars" that is pretty wide, going from the south Lebanon to Gaza and the whole West Bank. But since that changes every day, that's not a border. If you ask them, they will also say it's not a border.