Eh, I'd have to disagree with you. She created an entire sub-genre (pop country).
No, she did not. Faith Hill and LeAnn Rimes had both done pop-oriented country music before Shania blew up with Come On Over. She didn't "create" anything. That's as ridiculous as monsters saying that Gaga created dance music.
african tribal music --> negro spirituals --> blues --> country and r&b --> rock n roll --> pop --> rap and hip-hop
here's a basic musical timeline for those who need to now
throw in european instruments (especially considering the "mexican" instruments originated in spain) and you have the history of american music. you're welcome.
Despite Shania releasing a Pop version of Come On Over, several of the songs still had clear country instruments and not all songs (Rock This Country) were remixed anyway.
She still did a ton for country music.
Not to mention other country artists like Reba (I love her but ) and Garth Brooks also tried going Pop and Global like she did but failed.