The purpose of the patent system is to facilitate the progress of the "useful arts". The existence of large quantities of bogus patents that need to be challeng

The purpose of the patent system is to facilitate the progress of the "useful arts". The existence of large quantities of bogus patents that need to be challenged in courts acts as a severe barrier of entry, hampering this progress - if we have a system where truly everything is automatically granted without review and has to be disputed in court, then arguably a patent system like that is a net negative, only hampering the progress, and thus has no right to exist.