Literature from twin studies would like to disagree with you. Most people overestimate the effect of parenting and underestimate the effect of genetics in determining child success. Genetics is more than 50% of the game.
As for the other 50%, the absence of parenting is bad for a child, since much of development is based on receiving adequate amounts of care and nutrition. However, this amount is satisfiable by engaged parents interacting with kids after work. The relationship between outcomes and sheer volume of hours of care provided by the mother is only weakly correlated after a certain threshold.
tl;dr: Daycare is fine for your kid, don't overthink it. If you're the kind of person who worries about this sort of thing, you're already ahead of the game.
As for the other 50%, the absence of parenting is bad for a child, since much of development is based on receiving adequate amounts of care and nutrition. However, this amount is satisfiable by engaged parents interacting with kids after work. The relationship between outcomes and sheer volume of hours of care provided by the mother is only weakly correlated after a certain threshold.
tl;dr: Daycare is fine for your kid, don't overthink it. If you're the kind of person who worries about this sort of thing, you're already ahead of the game.