It looks like there's conventional framing overframed on top of manufactured trusses. Theoretically, there's no vertical load on the 2x4 "post" under the conventionally framed ridge, but in reality there is some load. This load is being placed as a concentrated load on the manufactured truss. The truss was likely not designed for that. More information regarding the truss design, etc. would be necessary before the recommending removal of the post.