I'm aware and that is one reason among many why I would support Clinton over Trump/Cruz despite thinking she is a corrupt liar who completely out of touch with average citizens.
It is still sad and detrimental to assume any democratic is automatically better than any republican, whether as POTUS, or for their SCOTUS choice. In the current state of this particular election that may be the case*, but it's still a bad mindset to have towards politics.
*Personally I think there was one, maybe two republican candidates that I might have preferred over Clinton.
All one can say from this is that your football fan analogy is a confusion. We need to have both... people who support candidates because of their individual policies as compared to our own beliefs, but those who can see the big picture and what the policies and platforms of those parties represent.
Are you familiar with constitutional parliamentary democracies? Much more so than in the US system, the parties have programs, often more important than the fact that they have candidates. One tends to vote for the party. The party leader, in fact, can be changed while the government is sitting.
In the US, there have been eras when the line between Democrats and Republicans has been very blurry. But from 1860 to the early 1900s, the differences were on policies and programs. From '32 to '48? Ditto. The blurred lines again started in the television era and ran for a couple of decades, but by the birth of the southern strategy in '72, an ideological divide became apparent and it's become far more apparent, e.g. blatant, with only a minor respite, since then.
There are conservatives who would cut off a finger before they vote for evil libruls. There are moderates and progressives who'd feel the same about the reactionary GOP. A number of sincere people in these forums admitted in the last general election that they were voting Dem in local elections only to prevent the GOP from having a majority in the Senate and the right to choose bible-thumpers to head up, for instance, the Science committee. Similarly, the concern about the Supreme Court is sufficient for many.
Me voting for Bernie or for Hillary is a compromise of my political beliefs. They're both too far right, as was Obama. But I'll vote for them. I'll continue to support more radical candidates (by US standards) to make their ways through the parties and to support the more progressive candidates, even if they don't have a chance. But when it comes down to letting a narcissist and megalomaniac carry around the nuclear football, or selecting a Senate that is likely to appoint David Duke to the Supreme Court? I'll take the lesser of two evils.