Other engineering disciplines hire engineers who don’t have a PE all the time. There are more engineering disciplines where taking the PE exam is the minority than the other way around.
Of course they hire non-PEs. You can’t get a license without years (at least 4) of experience first. Most consultancies I know of would not hire anyone who couldn’t pass the FE, though.
My point is that there are plenty of electrical engineers, computer engineers etc... who never take the FE or PE exam.