This is frequently the response to an elegant solution (from the people not responsible for it).
This solution - vehicles having a single HP pool - has already been extensively used.
I used it in 3.5, writing up vehicle rules.
It's a lot like creatures having single HP pool and not HP-by-location.
...fair enough.
If it's so easy to come up with a better and robust system, why don't you do so and post your results?
Didn't I
just say that it's difficult to do so?
I have higher expectations of people who
get paid to do this than to come up with something that
I thought of in my freetime.
If you feel like throwing $40,000 at me a year, for which I would sit around and think up cool ideas and try to design a game, then sure - done and done.
And that's all I'm looking for. What more do you want?
People to not regard this as the most amazing innovation in vehicle rules evar?
Sure, it's simple. Sure, it's a solution. But it's not an amazing solution to the complicated conundrum that was vehicle HP rules. It's the first and most obvious one. And if that had been acknowledged, and the rules not proclaimed as the most innovative thing evar, then I most likely wouldn't have even bothered to post here.
Where do you want the envelope pushed? Back into cumbersome and overcomplicated? Been there, done that.
And that is why design is hard, because the goal would be to have vehicle HP rules that sufficiently model the way a vehicle takes damage (like the sections thing), but without being too complicated or cumbersome.
A solution to that problem, an
actual solution rather than a copout (which is what the single HP pool is: a copout), that was relatively simple and easy to deal with, would be worthy of being called elegant.
The solution they came up with? Not elegant, because it's freaking obvious.