>Arnold Schwarzenegger, for example, has almost certainly been "supplementing" for close to 60 years now.

He's admitted it and advised younger bodybuilders not to.

Having access to the best sports medicine doctors in the world means you too can look great at nearly 80.

You are 100% right, I don't see it as a negative though. Almost everyone in their 70's is on some form of medication. I'm mid 40's and have been on testosterone for ~4 years. Best shape of my life both physically and blood work wise. Testosterone (at sane doses), GLP-1s, etc are miracle drugs that dramatically improve ones' quality of life. While you are absolutely correct that "those dudes are almost certainly on some kind of testosterone" I see it as very positive.

My FIL, in his 70's is on a cocktail of pain killers, blood pressure medication and a hundred other things and has a hard time even getting out of a pool. I'll take being an old jacked dude over that any day