Let's present some facts, or at least what I accept as such.
One layer of tape makes the spine thicker.:)
A Layer of typical electrical insulation tape increases the bevel angle with approximately 0.7 to 1 degree.
That has no significant effect on how it shaves.
It has no significant effect on durability either.
In some rare cases it can reduce a steel's tendency to microchip.
Let's assume a 7/8" razor with a factory bevel angle of 16 degrees. Honed with tape that become 16.8 degrees. Let's assume, after 2 decades of shaving and touching up and rehoning, the blade narrows down to 6/8". At that point the bevel angle will have increased to 19.5 degrees. Still perfectly serviceable. Another 2 decades of daily shaves later, you might reach the 5/8" mark. Now you're almost at 25 degrees, and you don't like the shaves that much any longer. Suppose you're thrifty and don't want to retire the razor. No problem. You tape the edge and hone down the spine, with nice lateral strokes, till it measures 1 mm less. And the razor shaves happily ever after.
Taped or untaped, the same principles apply. Uneven honing pressure is bad. Tape doesn't prevent a spine from "doing work". It only beefs it up a bit, as if the razor was originally produced with a thicker spine.
That Filharmonica in this thread could have had a warp, which is a common occurrence. The previous owner could have worked around the warp by using a narrow hone. That way his bevel follows the warp. If you take such a razor to a wider hone, the warp rears his head again, by part of the edge refusing to touch the hone. It may take some extra work to dial in a bevel that compensates for the warp. But there's no need to alter the spine for that.
And certainly no need to fulminate against tape, because that has nothing to do with it.
Best regards,
Bart.