Is it necessary to send my 2-year old to preschool now Or should I wait and directly send her to nursery at age 3 years?

Nowadays most of parents do their child to send at earliest to preschools to involve and improve the social things..it is not necessary to have it at early stage of children ages. The parents forgot that the child should first involves with family and then society. Please Give extra time to child to learn things at home. We are having internet's to know what a child should learn at age 2 yrs. We can teach them at home. No need to pay high amount to playgroup schools and use that money to buy good educational/healthy toys. My opinion to sent the child after 3 yrs to nursery.