I've never thought about "seeing" the tubes, but all the mono block amps that I've owned sat fully exposed in all their naked glory, tubes bared, with no cages or protection.
You don't seem to notice them after awhile, but it's nice to see them just to remind you that they are there performing their magic.
You don't seem to notice them after awhile, but it's nice to see them just to remind you that they are there performing their magic.