If intergalactic space truly expands, why doesn't the speed of light increase proportionally, in order to remain Constant?

It seems two metrics are being derived from the same light. One based on the speed and one based on the spectrum. If the speed were the numerator, it would be a tired light theory, but as an expanding space theory, the speed is still the denominator. The Ruler used to measure this expansion. It fails on its own basic premises.

One way light does redshift over distance, is as multi spectrum packets, as the higher frequencies dissipate faster.

Yet that would mean we are sampling a wave front and the quantification of light is an artifact of its absorption and measurement. A loading, or threshold theory. That particle effect would be similar to the point lightning strikes the ground.

In which case, the curvature of this redshift is a consequence of it compounding on itself, not Dark Energy.

The theory cannot be falsified, only patched, so we have inflation, dark matter and dark energy.

Epicycles were brilliant math, as a model of our view of the cosmos and given we are the center point of our view, all it needs is more patches and it works.

Beware assuming the math is anything more than modeling. One wrong premise or axiom and all the shut up and calculate in the world is just so much GIGO.

I realize this generation is committed to the crowd effect, but if anyone younger reads this, remember the future is a continuation of the past, until it becomes a reaction to it.