When TS and I speak of the age of the singer, it has everything to do with the maturity and development of the muscles!
Similar problems can arise but each singer is unique and the issues they deal with come from different sources.
At 53 you will have gone through more hormonal dealings, and depending on your technical stability or what you have dealt with technically, and how long you've been singing etc etc your muscular behavior will be quite different than the 21 year old! This CT vs Vocalis balance is a constant development for many different reasons, and age - of ANY age - can and does make a difference! It's not a negative by any means - it just can give us a better sense of how we get to the root of the behavior and re-balance!