Studying law is piss easy, practising law is a whole different ball game...
The people I have seen graduate law, trust me, if they can do it with minimal effort, anyone can... (I would probably put myself in that same collection of bastard cases)
I wouldn't agree with this statement simply because law is a very specific subject that requires a specific set of analytical skills. It's not reading and reproducing read material. You actually have to understand it and apply it.
If what you're trying to say is that you don't have to be a genius to graduate with a law degree - that's true, but it's like that with a lot of degrees. Practicing law is applying what you have learnt. Imo if you suck at practicing then you probably sucked at law school too except school gives you a mediocre grade whereas in the real world it shows as actual results in cases and you'll probably get fired if you're horrible at it.
So yeah, you can pass any degree but will you be good at it?
To the OP. ATAR requirements represent the supply/demand of a degree not how difficult it is. Law is more difficult than Commerce because of its volume and because it's not as straightforward as the latter, however if you're inept at maths you will struggle in finance etc. If law is what you want to do then do it and give 100%. Most people taking law don't actually want to practice it and make the grave mistake of taking it as a generalist degree which it isn't.