Frank Jr stunted his own career by trying to be a carbon copy of his dad.
"Nice pipes kid, but you're no Frank Sinatra."
You’re probably right. Times change. Peak Male Crooner time started with men like Arthur Godfrey, Big Crosby and Pat Boone. It was finished it off in the late 50’s by Nat King Cole and Johnny Mathis among others. Even real talents like Dean Martin branched out into comedy roles, although he was very good.