While it shouldn't be necessary for a pilot to be a procedures designer, an awareness of the segments of an approach sometimes helps answer questions about IFR navigation --e.g., when is it OK to fly straight-in, when is it necessary to fly a course reversal pattern, etc.
Read the plates... terrain, restricted airspace, MSAs (and their distances when declared)... and area familiarity...
There have been cases where pilots cut the corner and gets too close to the trees... on the side of the hill!
With the advent of glass cockpits, newer pilots without a clue how to navigate without the ND/FMC IS becoming a problem that some carriers here insist that pilots under probation fly approaches using raw data only... Several Captains still insist that if the F/O cannot make the approach using raw data, then he shouldn't be flying... I'm not saying it's wrong or right, but it does reduce approach accident rates in the long term...
BOAC, that's a REAL concern! *sigh* There have been new pilots who fly so much by the book, that when something outside the book happens, they stop functioning!
PK-KAR