1. We cannot separate subjective experiences from objective reality. Collective subjective experiences are called objective reality. Absolute reality is unknown.
We can conduct independent measurement and recording, however, and quantify phenomena, and have multiple subjective interpretations of the data to minimise the subjectivity. Absolute reality may be known; our limitation is on our ability to prove that, not necessarily to determine it.
2. This is true even of quasi physical (spiritual) experiences. Most so called personal experiences can also be experienced collectively by many people under similar circumstances and if the same methods are followed. These experiences are also therefore part of objective reality as far as we are concerned.
No, the false conflation of not absolutely proven but reliably evidenced (i.e. gravity, light) with practically unsupported fringe-science (NDE as evidence of souls, genomorphic theory) and absolute woo on the basis that we don't have absolute proof of any of them is nonsense.
3. NDE's and OBE's are experienced by many people under certain circumstances.
Yes, they do.
Researchers have enough evidence that these experiences are not just brain generated.
No, they don't. The fact that you have to assert these are down to 'quasi-physical' phenomena which we can't detect shows that we don't have any definitive evidence that these experiences are a response to any external factors
Cases of born blind people seeing objects just like normal people, are instances.
Because of the way the brain works it actually wouldn't be, but even if it were that's not what's being claimed.
Corroborative details of activities in the surrounding area are also evidence.
No. That people have sensory apparatus that continues to operate partially whilst the consciousness is suppressed is not evidence of the supernatural, it's evidence that our eyes don't disappear when we go to sleep.
4. Therefore experiences of an after-life and of a soul or consciousness surviving death, are also part of objective reality.
No, therefore you are reaching desperately to try to grasp at some sort of scientific validity for ancient superstition in the guise of overarching ancestral wisdom being realised. Every piece of solid evidence we have suggests that consciousness emerges from brain activity; there might be something else, it's a logical possibility, but in the absence not just of direct evidence for that 'other', and in the absence of any evidence of activity in the brain that can't be explained by the conventional mechanics, and in the absence of any need for such a mechanism to explain the observed phenomena, the likely explanation with the information available is that 'souls' need to go in the bucket alongside fairies and magic.
O.