If you get hired as a nurse with no nursing degree does that make you a nurse?
If you give your friend a Tylenol and take their vitals does that make you a nurse?
If you have no social work degree you are not a social worker.
I understand that perspective which is clearly accurate to some, at least philosophically, although not always technically correct (if your job title in a gov position is "Social Worker", by definition you are technically a Social Worker.)