Profit...is it right or wrong?

Widely wrong.

Because the stronger, in this case economically, MUST benefit the weaker, in this case the Borrower.

Now, if I lend you a certain amount of money, why MUST I make money on it?

If in this case you ask me for it because you don't have it, it's a good and dear thing to "help" others by financing them to achieve their desired goal.

"I would have no reason to ask you for money if I didn't need it, don't you think?"

The poor man said to the banker.

"And I would have no reason to lend it to you, if not for the goodness of God.

However, since my God is different from yours, I am forced to ask you for interest."

The Banker (Jew) replied.