Everything is in Addition

One of the mistakes we can commit while interpreting a chart is when we say that a planet is in good dignity or in good house position and try to interpret it as positive one for all the events of life. Like, there is a concept which says that malefic planets are considered as strong in Dushthana Houses.

Agreed but they are strong for the matters of Dushthana Houses, not for the matters of other houses. Like, if Saturn is in 6th house then person can be a very good Doctor or Lawyer which are matters of 6th house but we can not say that same Saturn would help a person in his relationship life. Even if it is exalted or in Mool Trikon, it is still in 6th house of conflicts which is 12th from 7th house of relation and hence represents loss of relation. It indicates that person can get into some disputes and conflicts during Saturn time which can spoil his relation so he should be more accommodating in those times.