No I didn't go on a civ 5 binge I have no idea what you're talking about.
This was such a fantastic moment not only in the episode, but the series as a whole. I wanted to try and show just exactly what RD was doing. This was something she wanted not just for the time in which we've shared her adventures, but for her entire life. Something she seemingly wanted more than anything else. Something she would sacrifice blood, sweat, and tears to. Her dream above all others.
And in an instant, she gave it all away. Her life's dream gone.
Because she realized in that moment there are more important things in life than any one persons aspirations.
Damn good job Rainbow Dash. A lesser individual wouldn't have done what you did in that moment.
This is why when other people on the internet say she's nothing but an arrogant, insensitive show-off, it breaks my heart. Yeah, sometimes she can be all that. But hey, everypony has flaws. But what she did at this moment made me gasp and smile and shed tears almost. Oh gosh I lost it. Her loyalty really shows here because like you said, she realized there are more important things in life than those aspirations. She didn't like what she had to go through to be a Wonderbolt, and gave it all up.
Gosh, Rainbow Dash. You are the best pony ever. If a person ever says anything negative about you, I will laugh in their faces until my ribs hurt.
Definitely my favorite Rainbow Dash episode.
So much liquid pride was shed in this moment, given that joining the Wonderbolts was her most cherished dream, to give that up for a higher principle says so much of how Rainbow Dash has grown out of her hotshot arrogance.
And now she is one step closer to her dream.
By the way, do Lighting Dust is female or male, I mean, there is already a lot of female characters and Lightig Dust voice sounds a bit male, so I just do not know.