a) MONEY FUCKS SCIENCE. Viz: You can't even discover how much cholesterol there is in the median egg. The egg lobby says 70 mg. God knows how they're measuring it. If they work the way the drug companies do, they have an office-building somewhere full of people whose only occupation is to hunt out people doing research on eggs and offer to fund their next study - with the unspoken caveat that, if it's egg-friendly, it'll lead to more and more egg-study funding. Scientists like funding.

b) You can't avoid cholesterol, unless you're vegan. If you eat an egg, you're going to wind up way over your AHA cholesterol limit for that day. End of story.