This is really easy. Halflings are spectacularly fast. I know this because they are able to dodge polearms from skilled wielders.
Then every race is spectacularly fast. Because by the rules halflings are only slightly better at dodging polearms from skilled wielders than dwarves are. And this is one of the few times when Syndrome's "When everyone is special then no one is" is actually appropriate.
Of course there's the D&D issue that fighters are wielding nerf bats rather than swords thanks to the way hit points work.
Now, if you thinhk that the Hobbits were non-combatants who just needed protecting...are you sure you read the books? Because you're objectively wrong about that.
I'm not sure whether you've read them if that's what you think. The party breaks fairly early in part to separate the hobbits from the stronger fighters. From The Shire to Weathertop the hobbits are basically running from combat. From Weathertop to Rivendell the hobbits are running with Aragorn being able to fight back a little.
The party is only completely together from to its breaking up and in that time I recall one useful direct attack made by any of the hobbits - and that by Frodo into the foot of a thoroughly distracted troll. It's an escort mission
Then the party splits - Frodo and Sam are shown as being massively overmatched by just about everything they meet on the way except Gollum. Yes, Sam stands his ground against Shelob with the help of some magic items. But waaay overmatched. Pippin and Merry immediately become hostages, with Boromir failing to protect them (note again that Boromir does all the fighting) and the three surviving bigger folk start to hunt down the orcs.
And from then on Aragorn, Legolas, and Gimli kill literally dozens of orcs each, with Legolas and Gimli even keeping score - when a single orc hunter was more than a match for Sam and Frodo in Moria, forcing them to hide. Meanwhile at the Siege of Gondor one hobbit was a page and runner, and the other was riding pillion behind someone who wasn't meant to be there. And, admittedly, made a very successful attack on a distracted Nazgul but in no way was expected to fight.
So yes I am saying that (a) the hobbits were basically non-combatants and I can only recall them raising weapons four times (once vs the Nine, leading to Frodo's blade shattering just before the river leading into Rivendell, once to a troll, once to Shelob leading to Shelob impaling itself, and once to the first of the Nine). And that (b) the Fellowship set off on an escort quest with the five protecting the hobbits. And that (c) the choice of hobbits being so small was a great narrative choice because it made the rest of the world that much more threatening for our point of view characters.
I'm also saying that part of the point being made was that skill at arms was not the only virtue. Which is just as well because the hobbits didn't have it.