Spirituality is the connection to the higher power and whatever you call the higher power is up to you. The great thing about life is that you can decide what you believe in so that it fits your values.
A connection to the higher power can make frivolous complaints and losses in this world seem like small things to a giant. It helps you create your own reality and perspective in this world, which can be very different from another person's perspective. A connection to the higher power can make you feel alive and give you true happiness while here on this earth. Also, the higher power can be a source of strength and solace during times of grief, loss, confusion, etc. Your connection can bring light where the darkness lies.
The higher power loves you and wants you to learn, evolve, and serve out your purpose in life's journey. When getting Tarot readings, tarot card readers use their higher self/intuition/inner power to pick up on the energy that you (your higher self/intuition/inner power) are giving off, which is utilized to conduct the reading. As stated in the Tarot the Tool article, the higher self is the driving force that is picking up on the symbols presented in the cards and interpreting them to relay a message to you. This is why tarots cards are a convenient way of getting spiritual guidance that you may need so that you can get through situations that have been difficult to figure out with your rational mind. It can give you that insight that your rational mind refuses to acknowledge or it can be used as a confirmation.
So if tarot readings are telling you that you need to leave that toxic relationship, then what do you do? If tarot readings are telling you that your job is not going to get you anywhere and you need to go for a higher position, then what do you do? If tarot readings are telling you that you need to focus more on improving yourself and/or the well being of your children as oppose to focusing on your boyfriend/girlfriend, then what do you do? If readings are telling you that you need to listen more to your intuition/spirit or develop a stronger relationship with the higher power, then what do you do?
Tarot Cards can present you with the information that needs to be known, however, your response affects your own outcome since we are blessed with free will.
The choice is yours, so choose well.