Why 1st Year is More Important than 2nd Year in Pakistan?

How many times have you heard that 7th class is more important than 8th class, and the same goes for 9th class as it is the most critical class of your life?
I know you have heard a lot of times.
But in reality, the marks of matriculation don't matter much rather it helps to get admission into your dream college most of the time at the intermediate level. It is explained later in the article