I used to think as you do, but then I considered how rural Americans are treated by our government; by and large, their concerns are ignored. In my view, making their votes even weaker is a step in the wrong direction.
I too thought what you just said yet have changed my mind after reviewing the evidence as any skeptic would. The argument coming especially from the right and that you just repeated means that South Dakota, for example, would see and get no attention from the candidates and campaigns if it weren't for the electoral college.
If you look at state by state spending
You'd see that spending was mostly concentrated on key swing states. South Dakota got virtually no attention. Absolutely no attention from Republicans. Same goes with all those rural states that the right and you are so concerned about.
The right wing's and your argument is bogus. Small states still didn't get attention through a super sized voting power given to them through the EC. Instead some middle size states did. Is that a great benefit and worth disenfranchising the majority of voters in this country? Populations are collecting where the economy is strongest and growing. Rather than artificially skewing campaign attention to PA, let the campaigns focus on where the people and the backbone of the economy lives.