If you have PTSD, it doesn't matter where you are, the symptoms can present the numbness and thoughts you are discribing. However, there is also a heightened sense of awareness and sensitivity and yes, one can notice how others "do" follow along with the rules of a society in many ways "blindly" too.

While there is a kind of numbness and detachment, there is also a great deal of emotional sensitivity. It is a huge "wait a minute" that really does "hurt human beings and it's so wrong" that takes place. It's like being wide awake while others are walking around in a mindset of "sleep mode, or safe mode" which is believing it is best "not to feel" because it's too distracting.

Also, because of this new sensitivity, one begins to recognize how many people don't have the needed respect for others, the lack of empathy or ability to understand the significance of empathy too. The constant message is "Just Ignore, Just dont dwell, Just forget". It becomes very clear how so many can even get angry if you "need to feel and talk about feeling", STOP is something for example that my husband says to me, DON'T is something I hear a lot, and I CAN'T HELP YOU, is another one. One begins to recognize how so many honestly don't know how to actually sit with another individual when that individual needs to grieve and talk about their emotional challenges either. It can get very lonely, can lead one to feel they are too much of a burden and consider exiting life, that is how I felt.

While these challenges are very real and confusing, with patience and time and support, because you are not alone with this challenge, you can see life from a very different perspective and even become a person that will not tell others to "JUST" but instead will have the capacity to "sit with others and listen and help them grieve and grow" instead.
However, it does take time to get to that level, lots of patience, hard work that many others will not understand.

I understand that you are 4 years into living this new sense of awareness and you are seeing a lot of "realities" that "many" simply do not see. You need to grieve that too, however, you can slowly and gradually work through this and grow and learn and gain.
Life "is" fragile, you have definitely been forced to face that fact, yes, it's scarey too. And one of the reasons so many are not empathetic and fall into following along is because they feel "safer" that way, it's a "safe mode" many attach to out of "fear", fear of feeling and not knowing what to do about it.

((Hugs))
OE