You started with enough space for your wisdom teeth to erupt? If so, extracting them now would only be counterproductive. It wouldn't give your tongue any more space to correctly posture, and actually might lead to further reduction in tongue space as your teeth could shift back into the area where your wisdom teeth had been.

Consider yourself lucky if your wisdom teeth erupted in good condition and without pain. If you want/need more space for your tongue and mewing is not enough for you, then try expansion with an appliance (like ALF). 

I just started mewing and I have all of my wisdom teeth. I came close many times to getting them removed, but now I am glad I never did. I am hopeful that through mewing I can create enough jaw space for the wisdom teeth to come in fully. They are currently impacted.

Posted by: ShaktiOm

I just started mewing and I have all of my wisdom teeth. I came close many times to getting them removed, but now I am glad I never did. I am hopeful that through mewing I can create enough jaw space for the wisdom teeth to come in fully. They are currently impacted.

It's wise to avoid extraction, unless you start to have painful inflammation or infection. There have been some reports of third molars successfully erupting during palate expansion.

Posted by: Apollo

Here's the video from Gray where he talks about his wisdom tooth erupting:

https://youtu.be/pM9ratavY-s

Posted by: Apollo

TGW also mentioned his wisdom teeth erupting during expansion:

Posted by: TGW
I completely forgot to mention in the article that my lower wisdom teeth are erupting! They're jammed slightly, but they seem to be gaining more and more space and uprighting themselves.