I only want the dogtag just to have it in my collection. But yea people are lazy when it comes to these kind of dogtag tasks. I'll still be playing bf1 a year from now so I got plenty of time lol. Plus I got my CTE and A beginning dogtags so those are good enough to me.
The CMs promote those who are here to help the community long term before and after the promotion. The process is set up to intentionally weed out those who are here to make Hero only to get a dog tag and then leave, so if one isn't committed to continuously serving the Battlefield community then one's time is better spent in game unlocking other dog tags.
We had an AHQ Hero tag in BF4 as well with the same exact criteria. It was one of the rarest tags in BF4 due to the level of scrutiny applied to promoting Heroes.