If a new version of a dependency introduces a vulnerability, then dynamic libraries allow you as the sysadmin to stick with the secure version. For package man

If a new version of a dependency introduces a vulnerability, then dynamic libraries allow you as the sysadmin to stick with the secure version. For package managers, difference is how often the decision to update a library must be made. Dynamic libraries mean that the package maintainer of libFOO must be aware of security issues in libFOO, and update accordingly. Static libraries or AppImages mean that the package maintainer of every user of liBFOO must be aware of security updates in libFOO, which is a much higher burden.