That I would say would be taking the lowest common denominator and using that as the basis for evaluation. I prefer to look at Taekwondo in its highest light, practiced by the elite level practitioner for physical performance and the pioneers for their vision and philosophy as to what Taekwondo is really about. So in that sense, we are talking apples and oranges. My suggestion is rather than a romanticized conception of what you believe the Korean practitioners were doing in the 40s and 50s, that you look at the highest level practitioners today, because the pioneers will all tell you that today's level of skill is much greater than what they had going on, at least with respect to kicking.
One senior confided in me that even as late as the 50s and early 60's, they really did not understand the concept of kicking, how to use footwork to position yourself to land a kick with maximum speed and power. If you watch some of the old style videos on youtube which are out there, you can see that there was no commitment of body weight or momentum such that power in kicks would be generated. They simply snapped their lower legs with no commitment and no understanding. Many practitioners still do that today. But there has been tremendous development in kicking, and it's a whole new ball game.
Whenever I hear people say taekwondo kicks lack power, that it is a game of tag, I immediately question whether this person has actually seen or experienced high level Taekwondo. All it takes is to stand in front of an elite level player for a couple of minutes and perhaps those opinions would dramatically and drastically change.
The point I am trying to make is that when evaluating an art, we should look at the ideal or the elite level practitioner to decide the quality of the art, not what the seven year old orange belts are doing around the corner next to the dominoes pizza outlet. After all, and once again, we are all in a state of non-compliance, some more than others, but we are all striving for a certain ideal. Let's compare to the ideal, rather than the ones who are still trying to reach that ideal.