Most aging men are not high level athletes nor ever were. Steroids have many side effects. Taking them affects many other things, including downgrading natural hormones, and should not be done without a valid medical reason. They won’t make you big unless you train hard and will not give you the results you seek in small doses. If you are not used to training hard, having big muscles with weak tendons and ligaments is a recipe for chronic musculoskeletal problems. And what happens when you stop taking them?
There are certainly a few valid medical reasons for taking them, but they will not turn an average athlete into a better one and they are less important than exercising wisely, eating well and getting restful sleep. The mythology is largely wrong. The superhuman performance is a slight edge to people already competing at a superhuman level, and is still not likely worth it in the long run. It is true some celebrities and influencers take them - that hardly makes it wise. It is sad and unfortunate that unhealthy behaviours are associated with a false image of health.
Aging men should consider taking them if they are symptomatic, have proper testing done to show a marked deficiency, do so under a doctor’s supervision and have medical symptoms improve due to their use. Women occasionally have medical cause to take them too, not least for birth control.