Do they have any objective evidence for this? (even if you disagree with their interpretation)
Do they have any objective evidence of your maturity?
As other posters have said, you can make your in-state options work. Your parents know this. Whatever their reasons for preferring the in-state option- and whatever you think of those reasons- if you want to have any hope of changing their minds you will have to step and show them that you have thought through the options, looked at the costs and the benefits, and are presenting them with thoughtful, reasonable options.
Now, while it is all hypothetical, pull the amazing amount of help various CC posters have offered you on your various threads together into a few scenarios that work for you and that you can justify to your parents. We can’t do this for you- you know you, and you know your parents, in ways that we cannot, but as an example:
'I know you would like me to stay nearby for family reason X and financial reason Y. I understand X, and am showing that (this way). I understand Y, and have looked carefully at the costs of each of the colleges that I would like to apply to. I have done a lot of research into various colleges and am particularly interested in (a short list) for these reasons (Z). My first choice is Cornell, b/c (A,B,C): If I were to be accepted ED, would you let me attend? ’
The key point is to demonstrate that you have done some clear, focused, mature thinking that respects both your parents priorities and your own goals. For all colleges except Cornell you should do a cost comparison with your in-state options. Cornell has some specific advantages to it: it is an Ivy League school (parents may value prestige); your father went there (respect for your parent); very strong for what you want to study; and of course the ED + legacy bump.
What I can promise won’t work is (actually or metaphorically) stamping your foot and wailing ‘but I don’t wannnnaaaa stay home’, which is how some of your post comes across. On top of your ‘hey guys, what do you think about applying to colleges just for fun to see if I can get in?’ post it suggests that you haven’t gotten serious about making some hard choices about what you want to do and how you can get there.
A lot of people have given you a lot of great leads: now it’s up to you 