Since when was ‘parent of toddlers’ a kind of socioeconomic status? (Not that I disagree with you that it disadvantages such people). Also note that the OP sai

Since when was ‘parent of toddlers’ a kind of socioeconomic status? (Not that I disagree with you that it disadvantages such people). Also note that the OP said they found the coding questions were mostly easy/easier than they expected so maybe the amount of work required (for older/more experienced candidates) on preparation is not so high? I dunno.