Because "we'll be in touch" is not an observable state.
I submitted a job application recently.
It was one of those applications where you actually put in the effort. I read the job description carefully, tailored the resume, wrote a cover letter specifically for the organization, and answered the optional questions rather than pretending they were optional.
Then I clicked Submit and got... nothing.
No confirmation email. No "we received your application." No indication that a candidate record had been created. Just a browser page telling me the submission had succeeded and the vague hope that somewhere, deep inside an applicant tracking system, my carefully assembled application had not been written directly to /dev/null.
