Here's why:
* Backmasking is a deliberate process: Backmasking involves intentionally recording music backwards to create hidden messages. It's a technique used in some popular music, but it's not something that would be done unintentionally or without purpose.
* The Sesame Street theme song is meant for children: The theme song is designed to be cheerful and easily understandable for young viewers. It wouldn't make sense to include hidden messages that children wouldn't understand or might find unsettling.
* There's no credible evidence of backmasking: There's no widespread consensus or credible evidence to support the claim that the Sesame Street theme song contains hidden messages.
In short, the idea of the Sesame Street theme song being backmasked is likely based on speculation or misinformation. It's important to be critical of claims about hidden messages in music, as they are often based on misinterpretations or misunderstandings of audio.