"Suspension of belief" is not an excuse you can use to explain all nonsense,
it's about accepting the unreal elements for the sake of entertainment.
Sounds in space, throwing fireballs, or dinosaurs wearing human disguise, sure, people will accept it, but then you still ought to present a reasonable, coherent story.
"See" is built entirely on the foundation of "suspension of disbelief", but its architect is about as qualified as a drunken toddler is to propose laws, seeing as the finished product demands far, far more than that.
It requires the total suspension of reason.
Here, suspension of disbelief would be accepting a virus left only a fraction of the population alive, but left them blind. A post-apocalyptic setting.
Yet what you need to do here is accept these blind people regressed back to bronze age, where over 99.9% of the knowledge we have today is either less than a myth, or forgotten completely. It's a world where people don't even believe in the Sun, moon or stars, and indeed, where "sight" is a concept regarded as ridiculous (aside from being heretical warranting immediate execution in the name of "God").
You must accept that here is a world where small bands of tribal savages live in the wilderness, but you also have to accept their fabulous makeup, their well-done hairstyles, their stylish clothing and their fancy accessories. Why any of that is necessary - or even possible - when none of them can see, I don't know,
but then again, nor does the writer so who are you to judge!
"But where are the cities?" you may wonder, and the answer is: They're in the bank because post-apocalyptic city shots are way too expensive and totally unnecessary in a post-apocalyptic series anyway.
Accept is that all the "blind things" shown, such as heightened hearing and smelling, and accept they use tools to detect objects in their path like the blind would,
and then accept that they can fight like people who clearly see the blows coming and dodge them casually while retaliating with precision,
and accept that even though their other senses are unrealistically heightened to the point they can hear a horse breathe normally from miles' distance, the same people can still be sneaked up on with ease by a heavily armored foot soldier, when the plot so demands it.
"Consistency? Reason? What's that?" -asked the writer before he resumed fantasising about his dashing, butchering knife waving, blind martial artists putting on their scary warpaint sensually before the grand battle over their prized berry bushes.
If that all doesn't sound too bad and you want to give it a shot, prepare to vacate your mind of all thoughts and watch it as you are supposed to: Drooling.