Difference between Einsteinian Physics and Einstein-Free Physics

As the observer starts moving towards the light source with speed v https://youtube.com/watch?v=bg7O4rtlwEE, the frequency at the observer shifts from f=c/d to f'=(c+v)/d, where d is the distance between subsequent light pulses. This result is acceptable in both Einsteinian physics and Einstein-free physics, but then there is a difference:

Einsteinian physics: The distance between subsequent pulses shifts from d to d'=dc/(c+v) so that the speed of the pulses relative to the moving observer can gloriously remain unchanged.

Einstein-free physics: The distance between subsequent pulses remains unchanged. The speed of the pulses relative to the moving observer shifts from c to c'=c+v.

Clearly Einsteinian physics is absurd while Einstein-free physics is reasonable.

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