No. You add the blueprint to level, and everything associated with it will be loaded as well.
A hard object reference is you’re essentially attaching the object to your blueprint … and when the blueprint is accessed, the object is loaded.
Pointers do not load or create a new instances. What I understand @chrudimer suggested is as you add your blueprints to the level, simultaneously create their respective pointers. It’s easier to go through that than loop through all actors looking for tags.