I don't know if it is wrong but it sure is optimistic.
I think I was at school at the start of rubbish like that being said (some teachers seemed keen on pushing it) but being the boring realist I was, I knew it couldn't be true. If I'd wanted to be a doctor or lawyer or something equally expensive, I was pretty sceptical that my parents could afford to send me to uni no matter how much they were hopeful I might attend (probably to study something less costly). LOL
I think the pursuit of fame however is in a more recent category all of its own...and of some concern. When I was a teenager and wanted to be a singer (not a hit record rock star but more of singing in a band locally) my parents viewed such ambition with great alarm. Their opinion of the entertainment industry was that it was a den of iniquity. So I got no support.
I think it is a fine thing these days if parents support their kids with such ambitions....provided they don't leave their kids with the opinion they can't possibly fail. If you can't get worldwide fame the option of creating a less lofty niche that pays the bills and you get recognised in the street or make it to local TV is not to be sneezed at. A sports person who comes second in a major competition or just competes in the Olympics is not a failure - they have earned a place in the history books. That's more than I could ever have achieved had I been interested in sport....not to mention the fact that I didn't achieve fame in any field come to think of it.
In an ironic twist, these days my mother says, 'It's a pity you didn't do more with your voice." ....completely (and conveniently) forgetting they had thwarted me at every turn. However, I hold no grudges. Clearly I was not ambitious enought to defy them! 
Parental support is a great thing but I hope they might dial it back a bit....and warn their kids there might be a downside or suggest a realistic backup plan if they don't achieve their ambitions.
