Meh, if that suits their creation better, than so be it.
I dont think anyone is advocating for 24FPS, but 30FPS just doesn't have that "1.5speed" look to it that 60FPS does. I love playing action games and racing games at 60FPS, sure, but these games are high octane and constantly in motion/action. TLoU(and Uncharted by extension) play slower and often use dybmaic camera angles, movie like lighting, and other cinematic visual traits that games like MGS:R simply dont(or would probably ever) utilize. ND isn't shy about wanting to create the mindset that you are "playing a movie", it's in part what has made them huge this last gen and I would argue their the only dev out there so far that has really captured that sense. To some, 60FPS can feel too "Hobbit 48FPS" like. As someone who loved Uncharted 3(and I do mean loved), the clip of the desert in 60FPS realized years ago always felt "off" to me. ND went great lengths to produce that "playable movie feel" for that chapter specifically(panning camera shots, etc) but the clip of Drake at 60FPS felt to visually jarring when compared to all the other effects used to produce movie like visuals. Frankly, I didn't like it and dont know if you could ever get me to play UC3 at 60FPS.
Really it's a matter of taste and choice. So much praise for TLoU at 60FPS has come from developers I trust that I honestly want to see what it's like. I might love 60FPS, but I love the idea that I can go back and choose my preferred setting. Much respect to the developer that finds a way to make the experience great for all fans.