I think there's a lot of reasons for the lack of understanding of healthy dietary patterns. As you said, medical doctors have little nutritional education as that role is usually outsources to dieticians. Working in the health-care field, I know that the vast majority of health care professionals are well meaning but are either not well equipped to interpret the scientific data or they simply don't have the time. There is also no doubt that there are bias' and some organisations don't deal well with change, although they do update their guidelines over time.
In regards to saturated fats specifically, the majority of the research
does seem to suggest that high quantities can raise LDL. On the contrary, there is strong evidence showing that unsaturated fats from nuts, seeds, avocados and fish can reduce LDL and the risk of cardiovascular disease. With that said, again, it has to be viewed within the context of your entire diet. If you generally eat healthy and exercise, any potential risk is mitigated and there's nothing wrong with adding some eggs, some dairy and some animal fats to your diet. There's a lot of nutritional value in something like eggs. However, it still seems that overconsuming those things isn't necessarily great and I think we can all agree that most trans fat and fried food is garbage regardless of quantity.
The AHA recommends about 6-7 procent of your total fats coming from saturated ones, and here in Denmark the recommondation is about 10 percent, which I think is more reasonable. This is the AHA statement from their website, which while lacking in nuance, I don't think it's necessarily bad advice for the average person:
There’s a lot of conflicting information about saturated fats. Should I eat them or not?
The American Heart Association recommends limiting saturated fats – which are found in butter, cheese, red meat and other animal-based foods, and tropical oils. Decades of sound science has proven it can raise your “bad” cholesterol and put you at higher risk for heart disease.
The more important thing to remember is the overall dietary picture. Saturated fats are just one piece of the puzzle. In general, you can’t go wrong eating more fruits, vegetables and whole grains – and taking in fewer calories.
https://www.heart.org/en/healthy-living/healthy-eating/eat-smart/fats/saturated-fats