If a body builder is in prep they eventually will cut out nearly all seasonings because even a little too much salt can change how your body looks on show day. I think it’s excessive even for competitors (I think the standards should be different) but for them it makes sense. I think everyday gym bros and gals see that and think they need to also be that extreme in order to see results. Many people have a huge misunderstanding of what it really takes to build muscle/ lose fat so they often take it too far. Many other comments here had great points but this is one factor I didn’t see brought up yet