That was an example. And the weighting system would instead set preferences towards larger/smaller targets.
The point is, that no two players are going to agree on what those weights should be. For example, consider the recent change to burst PD firing patterns, where it used to unload all its charges on the first thing that came in range, and now reserves those charges for fighters or missiles. For me, and as far as I can tell for most people, this was a really nice change. But I've seen someone complain about it, saying they used the old behavior to add damage vs. hull and would like a way to set it back.
Personally, I'd love a way to set phase beams to prioritize fighters. But I'm sure there's someone else out there who'd find that setting, if it were baked into the game, incredibly frustrating.
Which is why I was responding to NeutroniumFurnace's suggestion of making such weights adjustable in-game. Now, if you really think hard-coded priority weighting would improve the game, then here's my suggestion: Go for it. Make a mod that does that. Put it out there, let people play it, see what they think.