There's some dissention as to whether this actually helps lengthen life for most people (the salt myth). You shouldn't ignore your doctor, but neither should you blindly accept poor science.
Yeah, that always happens. There's people that think you should only eat fruit or that coffee enemas are the way to perfect health.
But the fact remains that there are multiple studies with strong links of higher sodium intake to heart attacks. Further, globally pretty much all major medical organizations (especially in countries with well functioning health systems) agrees on limiting salt intake.
There will always be a few studies that show that "actually you should eat 20g of salt a day!" and to me, that is the bad science.
The medical consensus by both studies and the experts is that you should limit salt. Telling someone "but those studies were all bad" doesn't convince me that the counter studies are good, but instead convinces me that the counter studies were likely flawed. If there were more studies that reinforced the bad studies, that might be something to talk about. But as it stands, we have just a noisy minority (suspiciously selling books...) that is making a claim without the significant studies to back their media tours.
Unfortunately the link you chose is crappy. It is a qualitative study debunking the claim "some researchers have propagated a myth that lower sodium might increase the risk of CVD, This article analyzes the eight articles as a case study" (paraphrased). Too little salt is not the issue, why would that paper be useful?
The clear advice is to lower salt intake, but from what I can tell statistical data doesn't show that doing that actually lengthens life. Admittedly, cause and effect is difficult science, even in well funded large population studies. Correlations and case studies are much easier science.
Personally I don't have a horse in the race because I have a relatively low salt intake: I don't like the taste of over-salting and I also try to avoid high-salt foods because they are often crappy industrial foods (correlation).
I did google for papers before making my original comment, but I struggled to find any papers I liked. I remember that one paper in particular was a meta-study: I really really hate those.
Edit: I asked Gemini, and it referenced this paper: https://www.jacc.org/doi/10.1016/j.jacc.2016.07.745 which seems fairly balanced: the first sentence is a soft "The relationship between lower sodium intake and total mortality remains controversial". I did a couple more follow-on prompts and Gemini referenced results from Britain lowering salt in processed foods "A 36\% decrease in mortality rates from stroke and ischemic heart disease (heart attacks) during the period of the salt reduction program.". https://g.co/gemini/share/42637d5a2dfb I feel embarrassed rereading my prompts since they show my ignorance and other problems, but the eventual AI results are interesting. Asking the right questions is hard...
There's some dissention as to whether this actually helps lengthen life for most people (the salt myth). You shouldn't ignore your doctor, but neither should you blindly accept poor science.