Gurmat sources are the "core curriculum". The Guru Sahiban encouraged being well studied period. Something like Farsi and the related spiritual writings definitely qualify as worthy just not required.
Islam has two tenets that earn it that eye. Naam and Hukam.
Why Gurbani says that spiritually hindu is blind and Muslim has one eye?
Why puratan brahmgyani gursikh scholars like Baba Deep Singh ji and Baba Gurbaksh Singh ji were master's of Farsi and Arabic. They must hv read lots of Farsi Arabic literature as part of their education.
Guru Sahib quoted Persian poet ferdowsi in Zafarnama.
Guru Sahib got Persian Granth kimia saadat into gurmukhi from pir budhu Shah.
Isn't the above evidence not enough for us to understand that our gursikh students shud learn farsi and read farsi spiritual literature.
I personally think it represents the section just fine, only two of the guys in the image have trimmed beards, the other two look like they have wispy beards, what's boing to be next, only allow people on the forum that keep a dastaar and an un-shaven beard.