Right oh no problemo.
As for the salt thing... you could experiment. If you're curious, you could try cutting it out and see how it affects you. Nothing stopping you from experimenting with your own body.
I've found salt terribly addictive (regular 'rock' salt) and hard to kick (they say as bad as cocaine?!). But, other than some store-bought vegan mayo, I really have no added salt in my diet any more. Been doing so for about a year now?... Not dead yet.
Salt exists in its organic form in fruits/veggies/nuts etc. Yes, you need it.
Yeah, sugar is super bad (one molecule away from being arsenic?!) I have almost none of that any more and instead use molasses/syrup.
Yes, I think a good amount of regular sleep is vitally important, too.
What to trust these days?? Hahaha nothing and no one. For myself, I do my best to research everything I'm interested in from multiple sources and from 'both sides'. Mostly, I have learned to avoid 'mainstream' ('official', 'authoritative', 'scientific') information -- having been presented with a skewed version of things time and time again (for questionable agenda)... and be leery of anyone who stands to make a buck from the information.