Because to me holding references to things is more valuable than holding knowledge in. I don't need to memorize anything, just need to have awareness of different approaches and things to solve problems. Which comes with time by using anything.
Kids pick up language differently though. Look at feral kids - the ones who have never picked up a language as a child often don't pick any languages up even later in life.
You can leave it all to chance, do it the same way the good ol parents did, it was good enough for me! Or you can plan how you raise your child.
Not a helicopter parent. Young Becky is as independent and happy as any other toddler.