You don't have my gear, and you obviously haven't seen my demonstration. I identify mobs that don't die in one hit to CF, and use cluster for them. It's not rocket science.
1) If everything dies in 1 crit in inferno, you must be playing act 1. in act 3 and beyond, while some mobs do die in 1 crit, there are many that will not, even with your gear.
You are presuming there are mobs behind, or within range for pierce. If mobs are dispersed in an arc, as they are when you encounter them, CF will always hit all three, whereas HA will not. I'm not even factoring in HA's 30% chance to pierce.
2) Even if they die in 1 crit, the pierce will allow the arrow to continue further and hit subsequent mobs behind. Damage on covering fire is limited to 3 mobs maximum.
3) How the hell did you get to as far as you are without realizing that all generators generate hatred regardless of whether they hit or not? I figured this out before the game even released and even people who don't know jack about the game before buying it will realize this by level 2.
I've never felt that hatred generation was a significant issue, so I don't read on it or test it, which is why I originally brought it up as a side note. I've admitted my error, yet you feel compelled to make a weak personal insult the longest part of your rebuttal.
When I say that I think CF is better, it is because I honestly think it is after testing both, and I want other DH's on this board to be able to use the best skill. I justify my views with both theoretic and anecdotal evidence.
Did you buy your character?
I've always stated, and I will restate because you appear to have poor reading comprehension, that the strength of each move is dependent on your gear and your playstyle. From your bitter diatribe, I can only presume that your gear is bad, and you find that CF does not work for you.
I didn't buy my character, but it seems like you could really benefit from buying mine