It’s not really the specific employees making that call. Being a “principle engineer” is the job title in the contract.
If it's your job title and you're not working for yourself, then it's likely there's little-to-nothing you can do about. This concerns folks referring to themselves as engineers.
“Software engineering” is a common globally recognized phrase. Anyone overthinking a popular phrase after decades of use doesn’t understand language.
It is as ridiculous as a medical association getting worked up about PhD grads, a rapper, or the author of “Seuss” books being referred to as “doctor” without a medical license.
You can’t regulate global language trends. (Successfully)