No. saying "thing" is the joke. He's denigrating himself not denigrating women. Saying he'll literally root anything.
Imagine if he said "Any woman will do." That sounds 100 times worse.
Given the vagueness of the statement I think it's hard to interpret either way with certainty tbh. You could be right, but it wasn't my interpretation on first viewing, and I suppose that's the crux of the issue right there. I think your interpretation is a bit of a stretch to be honest (and perhaps you feel similarly, that's fine), but at the end of the day it's not something I'd jump up and down about personally. I can understand why a woman watching that post-match interview would be a little put off by the interchange.
It's a pretty thoughtless and tone-deaf thing to say, but meh, at the end of the day I just hope that education around these issues is good and improving in the NRL. There's plenty of evidence over the years to suggest that the NRL (and not uniquely the NRL, this is a problem in most men-oriented team sports) has a problematic culture towards women within the ranks.
And at the end of the day, even if your interpretation is correct, ugly women are still women - still people. Referring to anyone as a
thing is a cultural relic and considered pretty disrespectful.