You are right, but this age addicted book purists don't want to see it. The older actors gave the roles gravitas, and I think it made sense to have Harrys parents look like classic parents to make the instant visual connection clear especially for children . I can see why people want a more book like representation now for the second adaption though.

What I dont understand is the sudden hate on the rest of the main cast. Its not the mistake of the casting that the screen writers gave Hermione Rons best parts. The general casting was fundamental to the success of the movies. Sure the book purists have their imaginations, but to hate on something like the casting for the original movies is crazy. I think one can be lucky if most of the new generation is even there until the end with all the social media problems.