Parents being overly demanding of their children is actually harmful.
Tips
history
Rooted in 《论语·微子》: 无求备于一人 ('don't demand that one person be perfectly complete'). The negative value is Confucian: judge people by their strengths, not their flaws.
mistakes
责备 here means 'to demand completeness' (备=complete), not 'to scold' as in modern usage. Don't interpret it as 'demanding and scolding'.