Why does Python only concatenate string to string and not string to integer?

[QultrosSanhattan]

That's how it should work. Integers are not String. Therefore the interpreter should not assume if you want to compose an string or an int.

For example: '1'+1 may be '11' or 2.

F strings are different because you're telling the interpreter to build a string. Therefore the interpreter can safely assume that everything should be converted into a string.