My feeling on this has always been that, if spirit guides and psychic powers are real, they'll communicate as best they can...however, if all they can do is snapshots and auditory snippets, it's hard to get a clear picture from that and the psychic will fill in the blanks on their own. For instance, we all know Kisha, when she's on and she's getting things correctly, can give you a number and it generally corresponds to the question you're asking, but she can't say if that timing is hours, weeks, days, months, or even years...she can
guess, based on what her guides are telling her and what her intuition is telling her, but she can't be sure...but she has that number and she can provide it for you.
This is why I've moved away from no-tools readers. I know a lot of people feel like tarot cards and astrology are crutches, but I can honestly say my most accurate predictions have come from tarot readers who also (supposedly) have psychic abilities, and astrologers who know how to properly read a person's charts. In the case of tarot readers, the guides or energy or what have you should (in theory) be helping to arrange the cards during the shuffling process to ensure that the messages given apply to the situation at hand, and tarot cards frequently have very distinct meanings...even the ones that can be interpreted different ways usually are very clear when put into the context of the question.
With astrology, I don't know that there necessarily needs to be any psychic ability involved at all, but I think the astrologists with psychic ability are better able to interpret what the different things that come up in the chart mean - for instance, if you have someone asking about two people that they're currently pursuing (or being pursued by), and the astrologist sees hardship coming between, say, January 12 and January 27, a psychic astrologist might be able to determine which relationship is going to be impacted, whereas a regular astrologist would probably need to consult the other two charts. Honestly, I'd be more likely to rely on the astrologist who consults all the different charts myself, but that's just me.
I guess what I'm saying is, I feel like you can probably get these more detailed readings that might be accurate when a reader uses tools, but when I get exact dates (or even timeframes) and methods of communication from a no-tools reader, I tend to be wary.