Respected Gurujis and dear friends

I am beginner and I had been doing some reading both articles and the
messages from this group.

The loss to the bhava of the house is caused by the 12th house from
it right ? Now Ketu is considered to be the Moksha Karaka and also
Ketu causes loss to the bhava of the house that is owns.

If Ketu is in the 12th house he causes loss to bhava of that house so
does that mean the native will not get moksha.

Also it is said if Ketu is in the Lagna causes to the loss self which
is represented by the Lagna, thus Ketu helps the native in attaining
moksha. By the same logic Rahu would be in the 7th house which is
the house of desires, Rahu in this house would give rise to desires
which will act against moksha.

If rahu is in the lagna, this increases the desire one to know about
the soul and self as rahu increases the desire of the bhava, while
ketu in 7th causes loss to the material desires thus promoting
renunciation or giving up on material desires. Here my doubt is that
whether this promotes moksha.

I am just a beginner and my doubts may be due to the lack of
necessary knowledge that I need to understand.

Thank you
Ravi