WordPress is a great blogging CMS.

The fact that people use it for something else is what create strong opinions.

Example : woo commerce.

Products ? In the WP_POST db. Orders ? In the WP_POST db.

And in every post about WP it says that using WP_POST for storing your data is good practice.

Well I don't think it is (but it's only my opinion. A strong one).

And the problem is that a LOT of plugins and themes are like that.