Ah, there are so many benefits to babywearing! You don't necessarily have to wear your baby in a wrap, but for newborns that's usually the most comfiest because the pressure of the wrap and being curled up in the wrap is similar to how they felt in the womb. Babywearing will definitely help with breastfeeding (you can even breastfeed while they are in their wrap/sling) and it will free up your hands and time for your toddler
There's a lot of great information out there too on this. Dr. Sears (a well known American pediatrician) is a huge advocate for baby wearing and has a lot of great info on it.
Here's a link on just some of the benefits: https://www.askdrsears.com/topics/fussy-baby/baby-wearing/benefits-babywearing
Here's his full site on babywearing: https://www.askdrsears.com/topics/fussy-baby/baby-wearing/benefits-babywearing
Tutorials on how to use wraps: https://www.wrapyourbaby.com/index.htm
Basic Tips on Babywearing: https://www.marksdailyapple.com/wearing-a-baby-what-to-do-and-what-not-to-do/#axzz2L7ylXIjx
This is a link with a list of scientific studies done on the benefits of babywearing: https://www.thebabywearer.com/index.php?page=bwbenefits#Scientifically
More benefits of babywearing: https://www.atlantabirthcenter.org/2011/09/keeping-your-little-one-close-the-benefits-of-babywearing/
I don't really know how to explain why it's a parenting choice rather than just another item to buy. I feel like when I wear my son, he sees the world differently and feels differently about it than he would if he was just in a stroller. I think that when babies are just born it's extremely important for them to be close to their mothers constantly, especially if they are breastfeeding, and I think it helps that breastfeeding bond as well by allowing the baby to be with the mother constantly rather than in a stroller. I don't have anything against people who use strollers . . I use one every once in awhile too
I just know how my son is when he's close to be in his carrier and I think the benefits of it can't be ignored.