If there were actually competitive markets for ISP services, we would be having a different conversation. Not that the ISPs could ever just be trusted to 'do the right thing' as Pai seems to believe (we have regulations precisely because corporations cannot be trusted to do the right thing), but it would be harder for ISPs to unilaterally restrict services. Practically speaking, the only option now is muni broadband.
The interesting point in the article though is that anti-trust laws already have enough teeth to regulate bad ISP behavior. I'm not sure if this is totally true or if the wait and see approach and then regulate makes sense, but it is hard to regulate the future.