Don't worry, I'm not a gnostic.

God is spirit. At the very least, at that level, it must be conceded that yes, the spiritual is 'more' real than the physical, right?
I think 1 Cor 15:35ff has all sorts of good starts to understanding this. For example, "The body that is sown is perishable, it is raised imperishable; it is sown in dishonor, it is raised in glory; it is sown in weakness, it is raised in power; it is sown a natural body, it is raised a spiritual body."
I think this is pretty clear evidence that the spiritual realm is more... something... than the 'natural' realm, wouldn't you agree? I think 'real' is a useful and appropriate term.
Another place to look for elaboration on the point is the book of Hebrews. For example, where we are told that the 'Law is only a shadow of the good things that are coming- not the realities themselves.' (heb 10:1)
Shadows are real, of course, but they don't have the 'level of detail' as the object which is casting the shadow. A tree is more real than its shadow. The shadow is real, the tree is real, but the tree is more real.
This has nothing to do with 'literal' versus 'figurative.' A literal tree will have a literal shadow.
Your citation of 1 Cor 15:44 misses the point whereas my citation of it makes it. There is nothing that I said that should be construed as rejecting a 'both/and' perspective. I didn't say that the physical is unreal. I said that it was less real. At the very least, 1 Cor 15:44, which we have now both cited, proves definitively that what we are now is 'not able to inherit the imperishable.' What is coming is more than what we are now.
The above I think is unassailable. The additional contention is that already, in this 'natural' world, the spiritual is still 'more real' than the natural. Which again, is not to say that the natural is unreal. It seems like you miscontrued my statements as indicating that I was saying the physical isn't real at all. That's just not correct.