My understanding is the body needs the spirit and cannot exist independently without it but that the spirit can exist independently of the body.
One proof if this is dreams. Sleeping on ones bed with the physical body at rest one can converse, travel, hear see and speak and even travel to distant lands. These are proofs that there is a life within us other than the body and independent of it.
If you dream then you know there are other worlds apart from this one.
Dreams aren't spiritual. What we experience etc in dreams are deform things we already experienced in everyday life. That's like saying when I creative write something that isn't distinguishable with a name it exists outside my experiences and other things that influence and define the art even if I can't categorize it.
I agree with some religions where the body and spirit are joined. When the body dies without good rest, it upsets the spirit. When you do rituals to heal the spirits then they can better rest and if they want take care of their loved ones. I mean, when someone dies, we can feel their presence around us. If spirits are separate from the body, they wouldn't influence us physically and psychologically. However, because spirit and body are connected, and family are one blood, they connect with us just as they did with their own bodies.
That's how we communicate or pray to spirits is because they communicate back with us through our bodies. To say they are separate is saying that I'm disattached to my family because my body died and I can't communicate with them anymore.
As for Catholicism, from what I experienced, it's not the same as above. They'd call that paganism or witchcraft. It's just how people connect to christ. If anything, out of statues, mary, and jehosaphat, if people want to criticize the Church, I'd focus on the Eucharist (consecrated bread and wine) because
that is the only "object" that is worshiped.. Nothing else.
Also, Catholics know that they see actual bread and actual wine. I mean, I had seizures from going to Mass weekly and realize that I was drinking alcohol. Maybe people are ignorant or oblivious to it but if you asked them if what they think is jesus christ is actual bread, holding bread, and taste like bread, it may take them awhile, but they will admit it's bread "on the outside."
A theologian saint studied the Eucharist and said that the accidents are bread and wine but the substance (if I got the two right) are jesus christ.
Some people call it symbolism. Jesus actually appears when more than one person comes together so it's not. Mass is celebrated daily.. so..