The weirdness of random seed

I don't know if any of you have experienced this, on some days all the generated images and videos are excellent and on other days they are just terrible. This happens with all the models. I have been playing with local AI image and video for over 2 years, I am sure people who have done this long enough will experience this same phenomena. How is the random seed generated? If there's an algorithm, then it's not truly random as it can be generated from current time or date. There's a scientific study of consciousness affecting random number generator.