I am betting I have attended far more trance lectures than you, and certainly most of the other people on this thread, who seem to have closed minds.
I attended trance lectures at the spiritualist association in London during the 1970s. Listening to mediums like Ursula Roberts, and Ivy Northage, both now dead. But their writings can be found on the Internet. I also attended White Eagle lodge, and trance lectures by Grace Cook.
I sat in two psychic developing circles one of which was conducted by the medium Trevor Williams, and I went to countless services in spiritualist churches over several decades. I state all this to make clear I did my homework and my views are based on much experience. It took me two years of attending church services to come to the conclusion that the most likely explanation for the evidential messages I received was that the mediums were doing what they said they were doing and getting messages from the spirit world. I base that view on the high quality of messages I received and the fact I was told many things the mediums could not have known. I was aware of cold reading from the start and I did not tell the mediums anything and attempted not to give any body language. Keeping a straight face and not responding to anything I was told. Never the less I received many evidential messages.
I think most people here write off mediums with no experience of them, but if they spent enough time researching psychics they might find their negative opinions would be changed.