Who says it's "very simple"? You? How do you know?
Does it matter whom He was speaking to? Was the command given to everyone or just to the people he was with? How do you know?
What does "do this in memory of me" mean in the context of a Passover ritual observance? Is "do this in memory of me" even an accurate translation of the Greek (answer: not very)?
so if you choose to do that in your own home with a slice of wonder bread and a glass of red wine it doesn’t count?