You're right that its not what socialism is, but its what attempts at socialism become.
Like communism, no one has truly gotten there in terms of the positive ideals of socialism. And I believe it's because the concepts are fundamentally flawed. I believe ideologies like socialism fail to recognize and take into account human nature. Attempting it inevitably results in those responsible for undertaking it becoming corrupted and seizing control and power indefinitely, until all you're left with is what happened in all the other supposed socialist states.
I believe capitalism is the best of all known and all imperfect systems. Many of the problems capitalism causes can be mitigated through the kind of mixed, controlled capitalism we see in the aforementioned European countries. If you just wanted to make America more like them, id understand that. But that's not socialism. It's at its core capitalism with limits in place and public control of certain industries and such that the public can benefit from being somewhat nationalized. I don't think pure free market capitalism is the answer either. I think these so called mixed systems provide the best results of any known system. The question is getting the balance right. If you want America to go down that road, I don't have much hope for your success, but id understand and in many respects agree with that. But trying to achieve socialism I believe inevitably leads to the kind of disaster we've seen again and again. Uncontrolled entirely privatized capitalism isn't enormously better, hence my belief in controlled capitalism with most things privatized, some nationalized, and restrictions placed through legislation to prevent and mitigate the problems capitalism cause.
Even then it still wont he perfect, but I believe perfection in terms of running human society is impossible for the foreseeable future.
I fully agree this enormous wealth disparity is not ok, but if the climate is right to try and implement socialism, then the climate is also right to implement solutions that won't lead to down the same road to ruin other countries have wound up on. In my view, modern day american socialists are examples of the opposite yet identical problem we have from people who are terrified of socializing anything at all. Because of socialism history, many americans have an extreme and irrational fear of anything, even positive change that looks remotely like socialism. Socialists are the same extreme, only they have an extreme and irrational aversion to anything capitalist. To me it seems obvious that both these extremes are destructive and not in societies best interest. Moderate solutions are what I believe in. Keeping the best parts of capitalism and harnessing and controlling it through restrictions and some socialization. Currently we are too far in the capitalist extreme. But going the other extreme is even worse. The answer is the mixed system.