1. There are already apps/websites as an alternative for CSAs. Most of the time I have to call someone its because I couldn't do what I wanted through those portals, so adding an AI agent to the chain is unlikely to prevent an immediate escalation to a human.
2. How much money are you really going to save this way? CSAs aren't high salary employees. Sure you might need a bunch of them, but we've already seen that brand loyalty erodes quickly when you remove the human touch. United/Spirit airlines offer opposing views on the cut your way to profitability perspective.
3. "Pay only for good outcomes" isn't going to last.
4. Are agents good enough to even do this? Yes, the cherrypicked examples sound good, but... I just know how well coding agents really work and my only experiences with voice agents in the wild have been very poor so far.