A lot of Guel haters spend their time hating on him to just have the entire point of his side plot... like it's right in front of you and you miss the entire point of his side plot??? The entire point of his time on earth is not to focus on him, it's to show you how shit the Earthians have been discriminated against and how their situation is terrible because of it. It's also showing how TERRIBLE the Bennerit Group is by highlighting the fact that they were targeting the escape ships and not just fighting and disabling the Mobile Suits the "terrorists" (Dawn of Fold), which would have prevented their future attacks without costing civilian lives.

While we're watching Guel go through literal war and terrorism (which was caused by the Bennerit Group, not the Dawn of Fold BTW) and see how oppressed Earthians are and everyone ignores it because it's Guel who goes through it. Which is honestly idiotic. Who else could have gone through it? Miorine? No, despite wanting to go to earth, she never could have seen this, she was busy with the company and finally being happy up in space and this was building up to her giving up the Aerial to Prospera and that wouldn't happen without Miorine. Suletta? No, Suletta would have gone with Aerial and either way it wouldn't make sense, she was too attached to Miorine and would have never left her side unless forced to, which Miorine wouldn't do unless she had a reason too (she does not). Prospera? Doesn't make sense, she wouldn't care about the conflict at all. No character at that point had any business being anywhere near earth because they were building up the action in space and what would happen on earth during the conference and later on Quiet Zero. And none of the Earth House characters would be strong enough/important enough to follow back to earth beside maybe Nika or Chuchu and even then they also needed to be in space at that moment. Guel was the only sensible character with a motive to distance themselves from Asticassia at that time and that's why he's the best character to be out there realizing that "Oh shit! This is fucked up actually!"