I am not interpretting. I am reading.
#1 Words have meanings. A car is not a truck. Maurijuana is not heroine. A minor is not an adult. A house cat is not a lynx.
#2 Laws are applied based on the words used in the law. The speed limit is different for a car compared to a truck. The speed limit is the same for cars and trucks in a school zone.
#3 If a law is written with a general rule followed by a specific example, the specific example is an exception. The speed limit is 55mph. The speed limit for trucks is 50mph. All vehicles have speed limit of 55mph except for trucks.
#4 If a law is written with a list of specific examples followed by a general rule, then the specific examples are leading up to the all inclusive rule. Bicycles, cars, and trucks need to stop for pedestrians. All vehicles on the road need to stop for pedestrians.
Both #3 and #4 can be combined simply as the later rule clarifies the earlier rule.
The law in the Torah about Hebrew slaves gaining freedom is given in two places. The later verse is all inclusive clarifying the earlier verse.
כי־ימכר לך אחיך העברי או העבריה ועבדך שש שנים ובשנה השביעת תשלחנו חפשי מעמך׃
And if your brother, a Hebrew(masculine) man, or a Hebrew(feminine) woman, is sold to you, and serves you six years; then in the seventh year you shall let them go free from you.
I did make a mistake quoting this verse in english previously. It doesn't say "man" or "woman". It says a Hebrew-masucline and a Hebrew-feminine. That means this law applies cradle to grave if the person is a Hebrew.
Judaism does not allow intermarriage. Looking at the previous verse which is what you are calling a trick to coerce the slave into indefinite servitude. It says that the Hebrew man is given a wife. This means that the wife is Hebrew. The children are also Hebrew. Therefore the freed slave is seperated from his wife and children for a maximum of 7 years.
Good to here?
You made a claim:
You now have the burden of proof.
"doomed for life" is clearly stated in Exodus 21:6.
Then his master shall bring him to the judges; he shall also bring him to the door, or to the door post; and his master shall bore his ear through with an awl; and he shall serve him forever.
"doomed for life" is never applied to the woman nor the children in any of the verses brought.
The burden is on you to prove the claim you made.