It's because in a league with a salary cap footballers aren't just footballers - they're footballers with contracts attached.
Do I think Averillo is a good player? Yes. Do I think he'll probably improve the Tigers' first grade team? Also yes. Do I think he'll improve it by so much that I wouldn't mind if the money we're paying him means we can't afford to re-sign, say, Makasini next time he needs extending? No.
That's the point. You can't just say "who cares" what we're paying someone. I mean, sure, the club obviously thinks it's worth it but the club also thought Russell Packer, Josh Reynolds and John Bateman were worth it. We're allowed to have different views - that's sort of what this site is for.
I agree that we don't know what any contract is and I'm sure media reports are often inaccurate. But, again, this is the "signings, suggestions *and rumours*" thread and we can only discuss what's out there. If it's being reported that we're giving Averillo average annual value of around $650,000 that's obviously fair game to discuss - and much as we all slag off NRL reporters I'd be pretty surprised if it turned out to be $300,000 or $1m.