This is a good point. The aim isn't to just tell people to go for a jog / cut calories, but to provide them with access to a structured program to help. For people losing wieght that might be 3 months free access to Slimming World. For people with depression that might be 3 months access to a structured sports group, or help to access Park Run.
But your point is one of the things that I found so irritating about the exercise advice. People would describe profound deep depression, and someone in the comments would say "go for a jog" (or "cut out sugar"), which always felt really trivialising.
Here's one park run that's coordinating with their local NHS Mental Health service provider around suicide prevention: https://www.sussexpartnership.nhs.uk/our-events/parkrun
But your point is one of the things that I found so irritating about the exercise advice. People would describe profound deep depression, and someone in the comments would say "go for a jog" (or "cut out sugar"), which always felt really trivialising.