The way these big firms work is they make a bunch of almost contradictory arguments and you have to show they’re all false in order to win the law suit.

So it’ll look like:

1. I didn’t do it.
2. Even if I did do it you can’t prove it was me.
3. Even if you can prove it was me I wouldn’t be liable.
4. Even if I was liable this has to be settled by arbitration.

So you have to get through arguments 4 and 3 first, to show that it’s worth the court trying to find out what happened. Then they’ll fight you tooth and nail on points 1 and 2 later.