So why don't people contest hotzone?

No but seriously, this isn't even a green specific issue where they all go to the hotzone and no one else does, this happens with red and i have seen it happen with blue.

One team sits in hz and counts as 45 players in zone as the two other teams just kinda do nothing.

Like do people not realise how incredibly profitable fighting that is? That's at least 10-11 ppl in hz. One kill there is 5 to 6k dollars.

I often like going in there against a large group regardless of whether any teammates show up, but it's so rare to even see a 4 man attempt fighting them, let alone like a mirror match of 10 ppl.