If you write one for likes and shares then yeah, totally dead. The same is true for all internet content though. AI has removed the need for anyone to ever visit a website again if they're happy to read what AI generates.

If you write one to solidify your thinking, or for you to refer back to in the future, then they're just as useful as ever.

Also, if you write a good post people will drop into the comments to accuse you of generating it, which is pretty disheartening. You can't blame people for not sharing.