Praxis Grammatica - Is This a Misanthropic World View in Latin?

The 17th century Praxis Grammatica tells you to learn from others' mistakes:

[ 408 ] Magnus erroris magister, populus.
[Anglice (English Translation)]

• How to Pronounce Latin
• Latin and English Differences in Agreement
• How to Read Latin Adjectives

• Seneca on Man's Unspeakable Evils

Do you have a different interpretation? Please post in the comments about this bit of wisdom from Praxis Grammatica.