As an honest person, that makes sense. Unfortunately, the world is filled with people who are not. If I have to give my money to Alice to give it to Bob because Alice is the only person with a way to get it to Bob, I'm trusting Alice to just do that. But Alice is a business woman and is doing this for lots of people. One day, Alice just disappears with everybody's money. All of the people that relied on Alice to get money to Bob just got screwed. So then they make a bunch of rules and regulations so that doesn't happen again.

MTLs, money transmission licenses exist to say you can’t legally handle other people’s money without proving you’re trustworthy, solvent, and compliant with anti-crime laws.