I recently helped a client organize her kids' five bathrooms post-renovation. They were all similarly configured, including one too many cabinet shelves!
Adjustable shelves are great because you can move them up and down to whatever height you need or remove them altogether. As you can see below, the shelves are too close together, making it tough to fit baskets to keep everything organized.
I had to remove one of the cabinet doors to get the shelf out, but it freed up so much space for better organization, including tall product bottles.
Sometimes less is more when it comes to shelves. If your shelves are adjustable, don't be afraid to remove one if needed for better organization!