I think it's unenecessary and ridiculous. Education is not a race. Babies learn like crazy just by watching the people around them but they don't need to be doing any sort of formal education at that point. In fact I would think you'd risk overstimulating them and/or stunting their development.
I think it's completely unnecessary. If children (even very young babies) are in a loving and stimulating environment they'll naturally learn so much. They don't need formal classes...let them learn in a natural fun way through play and independent discovery!
I do not think it is necessary or helpful in the long run. Kids learn more from free playing in their early years. There are neural connections being made while they play as infants and toddlers that improve their acquisition of language and math, etc., later in life. I think it makes people nervous when something can't be quantified and measured, and it is hard to know exactly what a child is learning when they play - but they are most definitely learning something important! My opinion anyways!