What is the purpose of the '==' operator when comparing vs '=' values?

First, note that I understand what is ==used to compare two expressions, and is =used to assign a value to a variable. However, python is such a clean language with minimal syntax requirements that seems like a simple operator for an ax. Also, I am not trying to start a discussion or discussion, but rather find out if there is something that I am missing to improve my programming knowledge.

As in (in python), we do not need to declare a variable, which should be an int or a string, and the language determines this based on the assigned value, why does the "if" operator simply determine what =is a comparison, not an assignment?
<w> Another example is that python got rid of many {} and [] in other languages ​​and simply used indentation because indentation and the use of curly braces are redundant. It seems to me that is if foo == goo:also redundant. But maybe there is something I don’t know about yet. Hence the question!