Economics is a social science like Linguistics, Political Science, Social Work and Human Geography.

It is not a natural science like Physics or Chemistry.

The problem arises when economists, typically "orthodox" ones (the very existence of an orthodoxy/heterodoxy should raise all sorts of flags) demand that the predictions of their models be treated as natural laws, which of course they aren't.

economic science is an ideology, it's not rooted in reality. That's why you have new emerging topics like behavioral economics that looks at how humans actually behave.

"Everyone acts in a way to maximise their personal profit" isn't a scientific statement, it's capitalist realism

This is incorrect.

You should read a summary of "capital in the twentieth century" , a famous book by an economist that asserts mathematically that taxation of the wealthy is the solution for this issue.

"Also tarrifs are a leftist thing"

This kind of talk helps no one, and asserts something that is practically unassertable. Even if we could split the world evenly in two between left and right and at some point the left were the first to propose tarrifs there'd be so little relation to today as to be useless

Protectionist policy exists on both sides of the aisle.