Honestly! - what is all this rubbish about thrust equalling drag in either a climb
or a decent
Doesn't
anyone here push the power up to begin (and continue) climbing, and reduce it decending!
In short, the loss of the
vertical component of lift is made up for by the vertical component of an increased thrust vector during a steady climb.
The loss of the vertical component of lift in a decent is made up from the vertical component of drag in a steady decent.