Well this web expert seems to agree with you:

http://members.cox.net/drslim/ch2.html

Cheers

Scout wrote:

Nav,
I was in a survival course this past July. Somewhere in my past I was told
to consume salt when sweating a lot. So I put salt in my theoretical
survival bag. The class expert (some Australian who's survived every desert
on the planet, and whose name I could recall only if forced to) informed
those of us who chose salt that we were dinosaurs, and we should throw the
salt away immediately. I believe he said I was a victim of uninformed
football coaches, to be exact.
Anyway, I was wondering under what circumstances you would use your salt.
Scout

"Nav" wrote

[snip]
salt tablets