Earlier quoted context omitted.
That was feasible in a world where every computer was air-gapped because there was no such thing as the Internet. Now every app needs to stay up to date for security reasons, even if it doesn't directly use the internet itself.
What types of security vulnerabilities could apps like LibreOffice or Photoshop have?
For example, cvedetails.com, some random website I found from Googling, lists 13 vulnerabilities for Photoshop and 31 for Libreoffice in the last few years.