Give me one good reason why I should buy a P19K mtb on a promo with 13 speed gear set

Wheels of Happiness

Rizal Philippines

5.28.2021

I went to the bikeshop of a fellow kapadyak who advertised for a P19K promo bike which has 13 speed.  I recently bought a cf MTB.  This is normally priced at 25k.  It has an RL, air shock, one by and 13 speed RD.  It comes with a Chinese RD and cogs

I asked him give me two good reasons why I should buy, or anyone?  Well because it is 13 speed (What is the difference in ride experience for 10, 11, 12 or 13 speed.   

Well maybe none.