The book of Jubilees tells us that the 120 years is refering to 120 Jubilees which then adds up to
6,000 years. Again that is why the age of our planet matters. Elohim is about to destroy our planet again cause of the corruption and violence!
I’ve made teshuva and have shalom! The righteous shall inherit the land but the wicked will be cut off forever. O Israel, return to HaShem Eloheicha, For you have stumbled because of your iniquity;
Take words with you, And teshuva unto HaShem.
Say to Him,
“Take away all iniquity; Receive us graciously, For we will offer the sacrifices of our lips.”
Forget the bone of contention. God only began to reduce man's lifespan after the flood. The combination of a new eco system plus the eating of meat caused the lifespan to drop. Generally, most people do not live to 120 yrs. However, the promise that follows the 5th commandment can enable one to live to 120 yrs and beyond. So honor your parents!