Of course it matters, because decisions like these don't exist in a vacuum. The rest of the world has an effect on what decisions get made, (well, in the countries we're talking about anyway), so if if a government has to resort to much more drastic measures to take your money, these measures are less likely to happen.
This doesn't mean that something like this will never happen, but I don't think anyone's expecting a perfect solution.
I think the gist of it is that the things you're being "protected" against with Bitcoin are, effectively, drastic measures.
Of course, there are people who believe that the existence of legal-tender laws is equivalent to jackbooted thugs breaking down their doors and holding guns to their heads. But those people probably aren't worth paying much attention to.
This doesn't mean that something like this will never happen, but I don't think anyone's expecting a perfect solution.