This is more of a spiritual battle imho. Those whose hearts and minds are corrupt will never be able to see. They worship men, the medical and woke educational institutions, and would be the ones most likely going to doctors often and taking all kinds of meds whose side effects will block their minds or pineal glands from seeking truths. The filter in their eyes and ears will prohibit them from seeing the truth presented in front of them.

Hence it's mentioned in The Bible those needs plenty of fasting (detox) and prayers