How does one pull the string on any bow 1 handed? One doesn't unless it's got a stirrup. And most with one need two hands to pull anyway.
It's a rules change in favor of realism - shocking for D&D. And, you could, in theory, do just like many a scotsman did in the border reaver period - one shot each from a weapoin in each hand, then draw steel and targe while charging. Looks very manly. Tain't all that effective (SCA experience using RBG's and Rapiers) - just charging into melee is good enough.
Needing to use two hands to wield a bow, such a tyrannical obsession with realism!
Pretty soon we'll be calculating arrow trajectories and Newtons of force to penetrate AC 18! That's no fun! I want to dual wield greatswords, where my fun at? I want to have a large flying dragon PC with unlimited laser breath and multiattack as a legal AL race option in Basic D&D, where my fun at?
D&D's all about MY fun, right? So I should get to pick any element from any TV show or movie and allow that at level 1. Otherwise the game designers are telling you what's badwrongfun.