Yes that's true, but for the current proportion it looks nice this way.( in my opinion )
If anynone uses this palm with a long trunk he should do it.
If you have more than one tree in your map and all trees look the same it doesn't look very natural, but if you have 3-4 different "versions" it looks ok. To create these other versions simply modify the original one a bit. ( pitch the palms head a bit for example )