If you want to build and prosper, you can find investors willing to put money into your project or business. Lending money is not the only way to prosperity, as evident by how we had an entire empire (the Islamic Empire) that prospered and was at the forefront of many fields, yet did not deal with interest.
People simply want the easy way out, and lending with interest is the easy way out in this case. It's intellectually lazy, and has caused destruction time and time again throughout history. But people turn a blind eye because of the relative few who stand to benefit greatly from interest, at the expense of everyone else.
How do you feel about the government being able to print money at will and devalue the dollars or euros you worked hard for? You can thank interest for that.
Think of it like this: if you are borrowing money for anything that does not increase your productivity, you're making a mistake. If you're lending money to someone for something that does not increase their productivity, you're increasing your risk of default substantially.
It isn't about greed, fact is, sometimes people need money they don't have, and sometimes people have money they don't need at this very moment, and if both parties make a good, sound judgment, both can benefit from this scenario. Every day people make their lives better by borrowing money. The view that lending and borrowing are innately bad is a very narrow minded view, one based on ignorance of the facts of how lending works.