what is the logic, mechanism or data he argues for this? I hate to say it's clickbait but a lot of the claims i here people mentioning from this guy are full of this.
There are studies where testosterone was given with finasteride and there was no difference in body composition.
Also, testosterone is more anabolic for muscle than DHT and dutasteride especially increases total and free testosterone.
You can also look up anecdotes on reddit of people being very strong, very lean with no issues on finasteride/dutasteride.
I believe our own
@TeknoViking has said in the past that he has great results with daily dutasteride and has no issues with physique, staying lean, libido, etc.