Without the physical, it's like you're trying to describe an empty room without referring the the walls.
For example, many people are christian but don't practice in a denomination. They don't even associate themselves with the physical body of christ because they say it's all spiritual. Yet, in scripture (and in most cultural religious traditions before and today) the gathering of a body of people regardless the religion is a physical thing.
The every fact these religions are physical makes their spiritual nature conflict with each other.
I don't know how to explain it, really. The physical is essential when understanding spirituality. They work together. You can make god-faiths prophets all under one god if just doing it spiritually but these religions value physical TLC as well. It's part of their religion.
I mean, I have no connection with Hindu god statues and I understand it. The Quran does not mean anything to me spiritually and I understand the spiritual and physical nature of it just as I do the Bible and other books held sacred. They have a different aura to them that the copy of How to Cook Spaghetti just doesn't have.
Do you understand that?
Yes I understand in this world they have an outward appearance but the inward reality is always there even when the body dies.
The spiritual world's exist although we only have been born into this one and have yet to experience them.