Hello

Your idea of what happens during a supernova is quite general. Secondary school explanation.

Since you think it is stupidity then I may say, stay with what you think.

For those who wish to understand what actually happens during a supernova (e) if you want the many.

Than you may need to research beyond secondary books. Read up on quantum matter and phase transitions, may even pay to read up on Lagrangians and solitons and electromagnetic reconnections of magnetic fields.

As for the end of a star’s life. read up the sequence of star formation. Then ask the question of how a star can become hundreds of times that of our Sun.

We are entering a new era in knowing and understanding the formation and evolution of stars and galaxies.