A bit late but I'd like to share my two cents as well. I was an avid fan of no-tool readings as I felt a genuine psychic with real talent would be able to deliver accurate readings with no tools, but hell no this isn't always the case. I have personally tried several no-tool readers and were not much accurate in regards to future predictions, even though they got a few minor stuff regarding the present right.
Keep in mind there are some no-tool readers that have good intentions but they may unknowingly deal with trickster spirits which mix up a few truths with several lies and no good comes out of your reading. Some may also genuinely receive symbols and info from the other side but fail to interpret it in a precise and accurate manner that really helps. I find no-tool readers and readings more risky and dangerous because of this. They absolutely have no filter of what is coming to them...
Personally I've had far more accurate readings from intuitive card readers as opposed to "no-tool" readers. If a reader can combine both his/her strong intuition skills and seek validation from cards, that's the best combo for me.