Why did the Founding Fathers created an amendment process for the Constitution?

The most important goal of the amendment process, found in Article V of the Constitution, is to provide American people with a permanent protection against any irrational ratification or proposition of amendments.

Explanation:

This article gives a description of the process for modifying the U. S. Constitution. These alterations (amendments) are commonly introduced by the U. S. Congress or a national convention assembly, with the need of the support of at least 2/3 of various states's legislatures.