a. By passing I am risking a probable 3-4 IMP loss if 5♠ makes versus a probable 10+ IMP gain if 5♠ goes down.
b. LHO figures to have either 8 or 9 diamonds or 7 diamonds and 4 or 5 clubs. Our defense of 5♦ doubled is likely to pick him clean (possibly with a club ruff or two), so +500 seems likely imo.
c. The play at 5♠ is sure to run into bad breaking suits. I could end up with two slow heart losers, or handling charges from 0-5 spades to name the two most likely horrors.
d. Finally,
It is bidding after a preempt which is, of course, always a crapshoot. I have no doubt that once in a while we will have +1430 available versus only +300 defending.

Help
