Shared libraries are not a good thing in general. They add a lot of overhead in this case, but more importantly they also add lots of unnecessary dependencies and complexity, and almost no shared libraries are actually version-safe, so it adds absolutely zero upside.
Yes, it can save on disk use, but unless it’s some very core library used by a lot of things (ie particularly things like GUI libraries like gnome or Qt or similar), the disk savings are often not all that big - and disk is cheap. And the memory savings are often actually negative (again, unless it’s some big library that is typically used by lots of different programs at the same time).
I think people have this incorrect picture that «shared libraries are inherently good». They really really aren’t. They cause a lot of problems, and the advantage really should always be weighed against those (big) disadvantages.
Pretty much the only case shared libraries really make sense is for truly standardized system libraries that are everywhere, and are part of the base distro.