Nope. Don't need it. My 4-yo still doesn't like juice (she's had maybe a half dozen sips in her life when she decides she wants to try it, then makes a face and refuses the rest

), and she's perfectly healthy and thriving. She only recently started being interested in homemade juice popsicles, just maybe last summer when she was 3. Only started liking homemade juice jello this year. She's just not a juicy girl. lol. She has been eating whole foods since she was 7 or so months, she never liked puree consistency so she just ate what we ate, so she's been gettign whole food fruit and plenty of the vitamins/minerals from there. It's pretty funny actually now that she's getting into the school system that I've had to explain to her teachers that she will not drink juice or milk, only water (and I mean quite literally, aside from tastes and then refusals of other beverages here and there, she has since infanthood and still
only drinks water)....and that it's not an allergy, just a preference and there's no reason to convince her otherwise since she has a healthy, varied diet. Neither juice nor milk are "necessary" if you're getting the nutrients elsewhere (i.e., breastmilk for an infant), water is quite sufficient. I actually am very grateful for my little strong willed girl who taught me this by her adamant refusals and made me rethink the party line on nutrition and look into other sources for her to be sure she gets what she needs.

:
Now, before I knew better

, I gave DS half diluted juice starting around 6 or 7 months, it was always 50/50 water/juice, and was diluted until he was about 3 yrs old, and from that point on he got maybe 4-6 ounces a day undiluted, he liked it packed in his lunch when he started school. I don't think it did him any harm, per se, but it was certainly not necessary especially as an infant and young toddler. He got plenty of fruits in babyfood and then whole fruits. This spring (He's 6-1/2) he decided he didn't want juice in his lunch anymore, and he'll have a cup maybe a couple times a week with dinner. Now he's obsessed with dark chocolate almond milk (and really, who could blame him??) ...which I dilute with plain rice milk so I don't feel as bad giving it to him with his lunch every day.

I think the thing is that people are for some reason programmed that small children won't like just plain water and they need some kind of sweet flavoring to get them to like things. Which is a total load, of course.
Be confident in mama, you're totally right!