I realized yesterday (about a week after the installation) that the fabricator/installer of our crema marfil vanity top used shims in several spots along the front of the vanity when they installed the top.

Wide shot of entire vanity

Close ups of the shims as seen from front of vanity

pics from inside the cabinet showing the shims

When asked, the GC said shimming is normal because the top needs to be perfectly level. I just want to be sure that the top is adequately supported. From my layperson's view, it seems like it would be better if it were supported all the way around by the cabinet boxes, rather than just in a few spots around the perimeter. This is a bathroom vanity, and I don't anticipate anyone sitting or standing on it, but still... Is this kind of installation normal/ adequate? If so, great! If not, what kind of remedy I should request?

Thank you!