It's not "forced arbitration", it's "contractual arbitration" which means both sides agree to it. Employment contracts are freely negotiable, including a contractual arbitration clause.
I think its similar to the arguments saying forced arbitration is fine for cell phone contracts, because you can choose to not do business with that company, when EVERY cell phone provider now has them...
EDIT: to be more specific: if you get raped at work, the criminal part against the rapist goes to court as usual. The case against the company because of establishing a rape culture and you seeking compensation goes to arbitration.