Rather, many of the best dive sites on Curacao are only accessible by boat, whereas most on Bonaire are nearby and accessible from shore.
I am certainly biased, and ignorant for that matter, as I live in Curacao, and have never been to Bonaire (yeah yeah, I'm workin' on it). However, I think that Curacao does sort of get an uncalled for Boat Diving reputation. The fact is that in 6 years of living here, and diving multiple times per week, I sill have never done a boat dive here. Well, ok, I did do the Dolphin Encounter dive, but the boat ride was 27 seconds.
It really is a marketing issue. There are probably not 5 dive operations on the island that specialize in shore diving, whereas we have a whole bunch of operations that have boats. Almost every week I am doing shore dives where I see boat divers getting dropped off to the same location. Even Watamula is accessible from shore, although admittedly, I'd do that one from a boat just for ease of entry and exit.
On a two week vacation with a rental car, and even the slightest sense of adventure it would not be possible to dive every single shore dive that we have here. There are experts on the island here (and posters on ScubaBoard) that could tell you how many shore dive locations we have. I personally have done maybe 30-40, and I'm pretty sure there are more than that to be had.
My$.02 and worth half as much.
Jeff