Yes this will most likely happen. I wrote my PhD thesis exactly around this topic (~8 years ago). It was fascinating to see in a lab setting how I could manipulate humans with voice agents (robots).
For anyone interested, from checking the HN profile the thesis seems to be “The Power of Robot Groups with a Focus on Persuasion and Linguistic Cues”.
https://ir.canterbury.ac.nz/bitstreams/cac255b7-43fe-4e08-94...
It seemed more likely to me they simply didn’t want to be perceived as tooting their own horn. Turns out that was exactly the case.