If I use the same AES key to encrypt two messages my communications are still mostly secure. Specifically, there's no known way to recover the key and attack all my other messages.

Versus if I use the same OTP twice my security is automatically shot and any other communication with the OTP is now also as good as leaked. Worse, context can then let much more of the key material be leaked than just the shared portion.

Even if used correctly, you've first got to create the OTP. Any mistake in generating your OTP means you can have a predictable pad and not know it. If you're trying to gather strong entropy you can know your lava lamps (/ geiger counter / etc) sources are random and be brought down by a bad camera driver.

Also, any methods to strengthen your OTP (ie, hash multiple streams together) are the very tools that you're avoiding by using an OTP. If you trust them you should just use them.