Say I firmly believe that Dr Pepper is the best soft drink on earth. Other people, who have a different opinion, come to me, thinking I am delusional. To prove their point they show me the hard data. The sales data says that the sales of Coke and Pepsi, far exceeds that of Dr Pepper, therefore my choice for Dr Pepper is a delusion, since the majority cannot see that as the best soft drink.
There are very few things an emotional thinker believes, that are based exclusively on objective merit, such as our soft drink tastes, versus the objectivity of the national sales data. However, subjectivity is often tailored to the objectivity of the individual; best optimization for the ego. Critical thinking may be based on collective objective standards, but it may not optimize the ego, as well as being whiny with refined tastes.
Religion is part objective and part based on emotional thinking; faith. It can be supported by subjectivity, as well as unique private data, that will be called subjective, even if it is objective to the person; dreams or visions. It feels right to me, like Dr Pepper is the best, even if the majority likes Coke or Pepsi. The spoiled child getting all the attention is not objective in any collective sense, but is about the ego being so important to individuals.
There is no psychological difference between secular emotional thinkers and religious emotional thinkers, at the level of the ego, other than how the ego is molded. Secular tries to inflate the ego in line with the cultural superego; Psychology. The Spiritual person plays down the ego; humble, in favor the inner self; religion and God's world view, which is less ego centric. Both like Dr Pepper, so to speak.
Many of the wars of words between emotional thinkers, arguing Coke versus Pepsi; Evolution versus Creation, has their ego as the prize. It is often the optimized ego underdog, versus the ego built on the prestige of consensus.
I think you are conflating subjective preference with the ability of the subject to accurately perceive objective events or phenomena external to the subjects mind.
There is no right or wrong as pertains to subjective preferences. There is something wrong if the subject sees flying pink elephants that the subject perceive exist externally to the subject, yet do not actually exist external to the subject.
So in the latter case, as regards the post you responded to, if someone imagines realms and entities that exist externally and independently of the subjects mind, yet are said to have the properties of being undetectable and unverifiable by any means, this presents a bit of a loophole in that evidence cannot be produced to counter the delusion because the delusion preserves itself with un-testability, if you will.