Even for a typical office worker, based on my experience at a large company, there might be 10 to 20 enterprise apps that include:

  * Tracking work hours
  * Communicating within teams
  * Entering and managing yearly performance reviews
  * Managing IT tickets
  * Catching spyware, phishing, etc.
  * Key and click logging
  * Personality and other screenings for job candidates
  * Health insurance management
  * Jira being used outside of software development
  * Database for archiving HR announcements
  * Password management for the above

In general, the prosperity of a business is a balance of assets and liabilities, and a software purchase is both, since it involves a cost. Managers promote purchases based on a variety of factors relative to the business and their own personal ambitions. There's no magic that makes managers so brilliant in the face of a salesman that they only make beneficial decisions, or that purchases are inherently beneficial, just because the product is software.