Not being afraid of orcas is a show of lack of respect for them. They can weight up to 10,000 pounds, swim at bursts of 35 mph, swim at slower speeds for huge stretches, launch their bodies tens of feet out of the water, and kill anything from salmon and rays to great white sharks, humpback whales, and even blue whales. There is a lot of argument that they may be the greatest predator ever, on land or sea.
A domestic cat can easily wound a human and can usually get away. That is not true of a human in the water and an orca.
Yes, orcas are extremely, extremely intelligent, and there's zero reason for them to eat us for nutrition, as they are highly tuned eaters that maximize their calorie intake per effort. However, a human is completely within an orca's decision process as to whether the human lives or not.
edit: I originally wrote out a long comment about exactly why your comment doesn't make sense to me, but after posting it I felt it was ridiculously long for its purpose, so if you want to waste time reading it you can find it here - https://pastebin.com/Y11P8ETs - but I think asking you to explain what you meant more clearly is enough for here :)
I think I didn't manage to see that meaning because the comment it was replying to had nothing to do with humans thinking orcas want to eat them, it was about orcas bringing food (like dead fish) to give to the humans. So more like a pet cat bringing a dead mouse to its owner than a cat in the garden fearing that the human wants to eat it?
ETA: swores mentions this in their pastebin
I’d probably be nervous if I was sailing on the Atlantic Iberian coast and saw orcas, they’ve been ramming and pushing rudders and fucking around with sailboats, no thanks.