My circle of dive buddies found Bonaire shore diving fairly easy, but that can probably be attributed to our substantial experience with rocky shore entries and surf in Southern California. FWIW, most of us were properly equipped with thick-soled boots. From what I could see, it seemed like the older folks with weak ankles and knees had a more difficult time negotiating the uneven ironshore. We did witness a couple of middle-aged divers who also fell, though. For us, preparation for entry began with a survey of the site (easy path to water), analysis of surf (usually mild), and figuring out the closest place to park the truck. Often times at the southern dive sites, a conspicuous, man-made tower of stacked rocks indicated an easy entry/exit point. We found that entries were best done by trying to keep a low center of gravity, timing the waves (if necessary), identifying where it was deep enough to plunge in, and then doing a gentle back-flop into the water while being positively buoyant. Then we donned our fins. I saw some people (not part of our group) trying to put on their fins before reaching the water's edge. Not the best practice IMHO.
Problems with the exit largely stem from people doing a poor job of underwater navigation at the site. On most days, we planned our exit point to be the same as our entry point. There were plenty of natural underwater features in the shallows to do this successfully. If you think about it, the exit should actually be easier than the entry, provided that the same location is used. For one thing, the topography of the location should be familiar, e.g., dangerous potholes should have already been scoped out. Moreover, while underwater, a diver can visualize the rocks/ironshore in the really shallow areas before exiting the water. I don't recall any of us having any problems with entries/exits on night dives either.
In my opinion, Bonaire dive sites are already very user-friendly. I'd hate to see a bunch of hand-railings mar the visual landscape of the natural shore. Perhaps visiting divers should make a more realistic assessment of their abilities to enter/exit Bonaire dive sites. Alternatives to ironshore shore dives include the stairs at several all-inclusive resorts (we used Buddy Dive's dock for a few night dives even though we weren't guests there) and boat dives.