You may not need it very much in the first couple of months, but think about when baby is a year or two old! Unless you're the Incredible Hulk, ain't nobody got the strength to carry a child that big for extended periods of time. :)
That's what I thought, I have weak noodle arms and my husband has strong many arms he can carry her all he wants but he leaves to work everyday lol
I used my stroller alot it was very useful I always bye the travel systems it's cheaper and it comes with stroller car seat and the base you don't wanna be carrying you little one around when he/she gets bigger and heavier and you want to go to the fair or a long walk ext.... very very useful tho lol