When say retired, do you mean at an age over 20, or 30 +? The reason for me asking is that, the word retired has a definite meaning to me. Also, your “career” also has me noticing language specific to an appropriate response.
Could you itemize what workouts signify a difference in strength, and what strength are you alluding to?
To address your question(s) more directly - unless you’ve sustained some sort of serious injury that you’ve nursed along the way (this is not unusual), your workouts should have balanced your strength equally. I rarely met a player who had noticeable strength issues - one side verses the other.