This is absolute nonsense in every way, in addition to being racist and xenophobic. You aren't special because you won the lottery of what line you were born inside of. Get over yourself.
Also, unfortunately the lottery is real: while there are productive people who become wealthy mostly due to their own effort, there are many more who are just born into a well off country and benefit from the history before. But the question is, should a country that is well off somehow let everyone in to enjoy these benefits because it is "fair"? I guess your answer is yes, mine is no. I'd say, if you drew the less good lottery ticket then it's up to you to climb the ladder, rather than get into a rich country and start using its social services.
And there is no ladder to climb, it is nearly impossible to migrate legally and gain citizenship. One of the many big lies of xenophobic, racist, anti-immigration people is "they should do it the right way, come legally" when for the overwhelming majority of people it simply isn't possible, and the current admin is making it even harder, motivated purely by racism.
Another one of the big lies, one that you are doing here, is wildly overstating the extent to which they "enjoy the benefits". Mexican immigrants are not eligible for most of the services provided to citizens.
Every attempt at quantifying the impact of Mexican immigration to the US is overwhelmingly positive to the country. You have nothing to stand on but racism.