What is MN 116 ( paccekabuddha sutta) about?

MN 26 describes the Buddha after his awakening, as follows: > *If I were to teach the Dhamma, others would not understand me, and > that would be wearying and troublesome for me.’ Thereupon there came > to me spontaneously these stanzas never heard before:* > > *‘Enough with teaching the Dhamma That even I found hard to reach; For > it will never be perceived By those who live in lust and hate. > Those dyed in lust, wrapped in darkness Will never discern this > abstruse Dhamma Which goes against the worldly stream, Subtle, deep, > and difficult to see.’* > > *Considering thus, my mind inclined to inaction rather than to teaching > the Dhamma.* MN 116 says: > *Once upon a time, five hundred Buddhas awakened for themselves dwelt for a long time on this Isigili. **They were seen entering the mountain, > but after entering were seen no more**. When people noticed this they > said: ‘That mountain swallows these hermits!’ That’s how it came to be > known as Isigili.* It seems when the world is completely saturated with 'thicksters' (Buddhadasa translation of 'puthujjana') & 'drooling idiots' (Thanissaro translation of 'eḷamūga') the Buddhas decline to teach. So what is MN 116 about? Do the silent Buddhas enter the mountain to end life, such as starving to death?