Does Computer System Validation really need to be time consuming?

Does Computer System Validation really need to be time consuming and sophisticated?

here is an interesting 4-minute video where Kia Kahhali answers the question and addresses the main pitfalls.

https://video.wixstatic.com/video/733bcd_b5f52a93a67d4326a0eaaee22a7bd923/720p/mp4/file.mp4