The façade is an important part of the house because it is what keeps moisture from penetrating the wall. It is worth taking care of it, e.g. by removing algae or painting it to prevent new clusters of vegetation on the facade.
If you’ve ever been stuck holding the door open while your hands are full, or even worse, if you’ve been rushing to get to work and then realized you left your office door wide open, you know how inconvenient these everyday situations can be.