That's cause Lou probably wasn't even 6'5 to began with even in his prime. I bet Lou was anywhere from 6'3.5 to 6'4 max
Lou was 6'4" and change in his prime. Today at 62 years old and hip surgery he's between 6'2" and 6'3".
Arnold was 6'1.5"-6'1 3/4" in his prime. Today he's lucky if he can hit 5'11".
The majority of Arnold's height loss occurred during and after him being the Governor. Another man who lost an incredible amount of height, who also held an office, is Bill Clinton. He was 6'2"-6'2.5" and today has dipped below a flat 6'0". I can provide pics if necessary.