One can write a grammatically correct sentence, yet it can be incoherent and still make no sense.

For example: There were no aliens that were intelligent enough to devour the huge green rocket which was stuck on the end of the propeller within the large, oval endowment.

Does that make any sense? No. Is it grammatically correct? Yes. Would anyone consider this sentence well-written? Well, if it makes no sense then no it is not well-written.
Thus, you are wrong, jasimp.