There is a banner article on jw.org entitled How Can I lose Weight? Directed to young people, it gives practical advice such as cutting out junk food, exercising, etc. So, it is not like the WT doesn't use its influence to give commonsense advice on mundane health issues.
When it comes to the Covid pandemic though, while the WT has been keen to keep a running tally on the mounting death toll of JW's it has neglected to offer any advice other than what is pushed by the mainstream media, which of course is bought and paid for by the pharmaceutical industry.
Counseling young people about losing weight so they can present a better image on Tik Tok, or wherever, and neglecting to urge older people to do the same to lower their risk of death from Covid is criminal. Taking something as simple as vitamin D3 and zinc can have a huge impact on our health. It has been found that many of those who have died of Covid have been deficient in D3. But the WT is against giving health advice other than what is allowed by Big Pharma.
Jehovah is well aware of their hypocrisy and treachery. The day of reckoning cannot be far off.