Wisdom teeth don’t cause your teeth to become crowded.
Think about it this way, can one tooth really cause the rest of your teeth to move that drastically?
Imagine all these cars are parked, and this car wanted to move forward (i.e. your wisdom tooth).
It may cause some movement of the car in front, but it’s very unlikely that it will cause the cars near the front to move. This is the same for your teeth.
The main reason why your teeth crowd is because the shape and size of your jaw changes and the position of your teeth change as well.
Its recommended to remove your wisdom teeth because you simply can’t keep them clean (since they are so far back in your mouth). As a result, you end up getting plaque trapped, and subsequent decay and gum infections.
Wisdom teeth may also be erupting at an odd angle causing damage to the tooth next to it.
Luckily, wisdom teeth are usually non-functional – they don’t occlude with opposing teeth – making them essentially useless. You won’t miss them when they’re gone.