What makes it so hard to get admission in FMS Delhi despite they don't give weightage to past academics?

Even though the FMS website does not share any criteria regarding past experiences but in the final merit list for admission they give 10% weightage each for marks obtained in class X and class XII. Along with this, they also give 5% weightage to Extempore, 15% weightage to Personal Interview, and 20% weightage to Group Discussion.

You may do very well in the 90% of the final merit list criteria but the 10% past academic performance is where you face the final heat and students who have scored exceptionally well have a higher chance to convert a seat in FMS Delhi.