Explain how two teachers, two high school students, a drug addict, and a barber are going to figure out what happened and create a cure. Also they are in a subdivision. Even if they had people who specialize in that sort of thing they don't have the resources to make that possible. How would this group of people coming up with the solution be a realer situation?
They also have no way of knowing what is happening at every facility around the world since communications are over. I think what they are showing is much more realistic than what you are suggesting.
The thing you aren't getting about either run of Walking Dead is that it's a story about regular people trying to survive. They aren't capable of doing the things you want them to.
So just because there is no cure and you will turn into a zombie when you die in TWD's world even
if that might not happen for years or even decades there is no point to living? That's like saying "Since we will all die eventually anyways we might as well just kill ourselves now." in our world.
There have to be slow moments. It can't be a 42 minute zombie killing spree every week. That would be an absolutely terrible show. I've been reading in these threads about how boring Walking Dead is for years and how the show is dying but they keep setting new viewing records. It's obviously going to end at some point but they are already on season 6 and still have a bigger audience than any other show on cable. That's a great run for a TV series even if it ended there but it's not going to because the numbers are still huge.
If you had read anything I have posted before, I suggested that since the show is located in L.A., instead of rural Georgia, and that they are at the beginning of the zombie apocalypse , that they might learn from the media about what scientist might think is causing this phenomenon, before the entire civilization fell apart. Like in the Night of the Walking Dead , they clearly said that it was a space probe from Venus that was full of radiation when it was brought back to earth and it caused the corpses to reanimate to life. This was the perfect time to put something like that on the radio or the tv stations , internet , before the power went out completely. Instead the characters seem completely oblivious to any media when they had the power ,other than canned prerecorded show on the car radio. This would make the show more believable in my eyes and they could even follow Z nation's lead in trying to have some agency working on a possible cure. Now the main characters you are watching are not capable of either diagnosing or curing the zombie virus. But they could come in contact with a government official ,doctor, etc that might slip this tidbit into the conversation and give me and others this information. I get this show and TWD is nothing more than a "Fight or Flight" psychological response , played out over and over ad nauseam. I'm just asking that they give the audience a possible cause and possible cure, that might give the characters and the audience some hope for the possible future. It really makes no sense that suddenly out of the blue and for not apparent reason , everyone in the world that dies, no matter how, will come back as a zombie. I suggest that they put a little realism into the fantasy and make it more real to me and others. I don't think that this is an unreasonable request. Otherwise the shows have just lazy writers who don't want to think that hard and just deliver the same tired show each week with highlights of violent gore thrown in for fun.