I think that a lot of that belief comes from national pride, but hey, that’s coming from a person whose national animal is a large semi aquatic rodent so...

I also find it interesting that in most Advertising etc the picture of the bald eagle is accompanied by the call of a red tail hawk... much more majestic than the high pitched trilling sound they actually make!
They do actively fish, and
love ducks. They don’t usually take on Canadian geese, but if one is injured, tasty! They behave differently in different areas, and depending on the food sources and availability. Ours usually just peck the tasty bits from the lambs, but they will pick up baby goats up and drop them off of the ridge. Would never consider going near a live calf with its mama, and our mamas won’t “park” their babies until they are able to flee well on their own.
It does vary, but I’ve never seen an eagle that was not happy about roadkill, hunters, or dinner day. They follow the vehicles, especially the tractors, looking for treats. We also deter them with methods that are not legal in your area around lambing time, so they are quite camera shy.
I’m probably going to need a reminder, but late summer/early fall, I’ll have to hang out down by the pit some and see if they get used to me enough to get some video/pictures of them for you all.