question #1 Sahih al-Bukhari 6562, Book 81, Hadith 151 : What is the significance of the description of the least punishment in Hellfire in Islamic teachings?

I heard the Prophet (ﷺ) saying, “The least punished person of the (Hell) Fire people on the Day of
Resurrection will be a man under whose arch of the feet two smoldering embers will be placed,
because of which his brain will boil just like Al-Mirjal (copper vessel) or a Qum-qum (narrow-necked
vessel) is boiling with water.”