>>130028
That type of reading works, and nobody who has experience in this will doubt that it does. A read by a first-timer with zero experience will still give broad-stroke right-enough information, and it's important to do this to see how the meaning of the cards is not inherent in them but in the interaction between the perceived and the perceiver at that level (yes, Buddhists, I know these are false categories, don't jump down my dick about this please. Read later Wittgenstein).
However, to avoid learning the patterns that were deliberately placed into the tarot is to seriously hamper your ability to read the cards successfully, hence why it is of importance to people who plan on making a real go of tarot to get a deck which retains as much as possible these lessons. You are quite free to make an oracle deck of your own (such as the Thoth tarot), and it will give reads as accurate as can be expected from a deck of whatever complexity you desire, but please note that there are established patterns in tarot that you may find useful, beyond the recognition of broad archetypes.
As it happens, Marseilles decks are indeed likelier to give good reads, but only to the extent that the reader invests some time into understanding the relationship of the various elements of the deck and why small details become big deals further on down the line.
Rider-Waite and related decks might be a great introduction to the notion of tarot and cartomancy generally, but the loss of fine details means that further extrapolation past a certain point must be wholly a matter of the reader, because the relations between the cards will have been scrambled. In other words, is actually harder to give useful reads using more modern decks unless you are particularly adept at divination and have some pretty finely tuned intuition. It's possible to get great at divination with Rider-Waite, etc, and it happens, but the closer to the originals, the easier a time you will have. Any high school algebra student can tell you that the more you round your numbers at the start of a problem, the less accurate your final result will be.