The trauma of witnessing his parents murder left a deep mark on Harry Potter. One that went unnoticed for 11 years. How would muggles have been able to find out Harry Potter, the Chosen One, is allergic to magical people? Needless to say, all of Dumbledore's plans had to go out the window when being in the vicinity of Hagrid nearly killed Harry.
10 years passed and Harry Potter found wealth and success as a Banker providing him the capital to feed his unrelenting curiousity towards the world he could never get near. He then meets and falls in love with a girl, Fleur Delacour, who is pretending to be a simulacrulum for her ex-boyfriend, a genius curse master Bill Weasley.
aka I'm Not a Robot as flowerpot and magical world still exists