What's up with zipper boots?

I was checking out Ebay for a pair of demonia boots and noticed that A LOT of them have zipper sides.

Now I understand that it the zippers cut down with all the hassle of buckles and boot laces, but still it feels like if you're going to spend 150$ on a pair of boots why would want that trashy looking zipper on the side? For me, it just seems fake and lazy. idk.
What's up with zipper boots?
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