Why does everyone love the Dallas Cowboys? Why are they the most popular NFL team? like everyone loves them?

Just a random question, it's because it seems that everyone or almost everyone loves the Dallas Cowboy's, like they are a majority of people's favorite NFL, Pro Football team, and a lot of these are people who have never even been to Texas, and neither do they have family, friends, or relatives from Texas either, or just from that region, like the Cowboy's have fans Nationwide, or World-Wide, for what reasons as to why are the Dallas Cowboys so popular? They have not won a Super Bowl in many years nor have they been to one in a while, last year they barely won their first playoff game in more than a decade. So just wondering, why does everybody love the Dallas Cowboy's? I know they have the nickname "America's Team", but why?
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personally I'm not a Cowboys fan, it gets very annoying seeing Cowboy's fans literally everywhere all the time, because it just makes me think and say to those people "why can't you just root or cheer for your hometown team, or a more local team near you?"
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I live in Southern California, and there are a lot of Cowboys fans here, maybe it's because Los Angeles does not have an NFL team? that Southern California has too many supplants?
Why does everyone love the Dallas Cowboys? Why are they the most popular NFL team? like everyone loves them?
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