Is AUTHOR wrong in the post ? POST : This is a really complicated situation but i'll break it down the best I can

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So my sister is a high-school senor who has dreams of being a model. My parents have put a lot of time and money into helping her achieve this since she entered into high school. Coached, classes, makeup, etc. Here's the issue though, my sister is not model materiel. When I say this I mean it in the nicest way possible. She's not an artistic person and can't design or do makeup. Along with this she's pretty "normal" looking and pretty much doesn't stand out at all and is not the kind of girl who would survive in a cut throat industry like modeling. 

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I'm not the only one who thinks this either. 3 coaches have dropped her because she just doesn't have what it takes to survive in this industry. My parents refuse to tell her why they dropped her but I know for a fact her last coach pretty much begged my parents to not let her enter into this industry. And I quote, "She will not survive and will be eaten alive".  
Despite all of this my parents still think that she can do it. To be fair to them, their only doing this because they love her. She has her heart set on this and I think it would break them if they hurt her telling her she can't.

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Well, my sister is graduation in this spring and wants to go to modeling school in the fall. My parents are trying to save every penny to send her despite the fact that me and her prior coach have both disagreed. I've really tried to be nice about this up until this point. Supporting her despite my opposing view, that was until last week. Last Friday my family was informed my sister all but confirmed to get a full ride in scholarships if she chooses to go to college. She's always excelled in academics, she got a 34 on the ACT and has a perfect gpa. As someone who is paying for college I think this is honestly a life changing opportunity for her. But, she's planning on turning them down and going to modeling school. 

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When I heard this I was furious. I told my parents they need to tell her now what her coaches said but they refuse. Citing that she can "chase her dream". Well, I don't think she should be chasing a dream off a cliff. 

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So, last night I sat her down and told her the truth. I showed her the comments her past teachers made including the letter from her last coach. I also told her that she just "wasn't right" for this industry and told her my opinions very bluntly. I may have gone a bit too hard during this I will be honest, but I don't think this is a matter to be taken lightly. This did not go well. My sister freaked out and pretty much yelled at me for "calling her ugly" and ranted about how I'm awful before running off in tears. I haven't seen her since and my parents have asked me to stay away from her for now. From hat my dad told me though she's an emotional wreck.

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I feel bad about this honestly. But, I feel it was justified and needed. I would rather she learns this now than latter while she has an opportunity given to her like this. And honestly, if she hates me her whole life but can live it i'm fine with that.