Saying "we only ever eat meat, let's try eating an orange and see if we like it before we eat any of this lettuce" doesn't follow any actual logic. You might hate lettuce, you might hate oranges, but there's no specific factor that binds them together.
Also what sort of things would you factor into what you prefer? How important is each of them?
Because that kind of lesser-of-two-evils incrementalist attitude is inherent to the first-past-the-post system we have now.
If my choice is between 1% of what I want, 2% of what I want or 99% of what I want, saying "why don't you just be happy with 2% since it's twice as good as the 1% you could have gotten" isn't the most logical point to make.
I care much more about getting a good voting system than I do improving our voting system, if that makes sense.
There's an impossibility theorem (Gibbard's) that states that for any non-dictatorial process for choosing among > 2 outcomes, there is no way to avoid tactical voting potentially swaying the results. The next-best alternative might be to make tactical voting so complex and error-prone that nobody bothers.