I thought Bouken was a decent series. Not spectacular, but not terrible either. However, I felt BoukenSilver brought the show down a lot because he just didn't flow well for me.
They were collected with the intent of sealing them away from humanity forever though.
There is no point in the show where the stuff they collected was ever going to be researched or used to benefit society in any way (even if only to be put on display for their cultural knowledge value). They just had to be stuffed inside cold metal boxes, shoved in a giant warehouse to rot because humanity could not be trusted to ever responsibly use their powers.
And then you set up bombs inside that warehouse so that if even one has the slightest potential to be taken away you destroy them all forever, just to be sure.
You know that a ton of the Boukenger's stuff was based off or powered by those things, right?
Heck, I'm pretty sure they explicitly state that Bouken Silver's rescue themed powers and mecha were part of their plan to research and develop precious based technology to benefit humanity.
They were just to make sure that mercs like Dark Shadow or homicidal maniacs like Ryoun didn't ge6 any world ending super artifacts.
SGS's supposed villainy notwithstanding, I really don't see how Dark Shadow can be argued to be anything other than what they're portrayed as, which are villains.
What should SGS have done with the Preciouses?
There's a few ways to fix this, but I'm going to focus on one, because it's very simple. Just don't have SGS's machines run on Precious.
or is being actively researched for historical or cultural purposes
Instead of looking like hero-adventurers, in the Indiana Jones mold, they're going to look like people out to hoard all the power for themselves. Pursuing power for its own sake is a classic villainous trait.
Rather than talk about SGS, let's talk about the setting. The very idea of Precious, of historical artifacts that are also power sources, is almost inevitably going to make the people chasing them look bad. Instead of looking like hero-adventurers, in the Indiana Jones mold, they're going to look like people out to hoard all the power for themselves. Pursuing power for its own sake is a classic villainous trait.
Go a step farther. Let's say SGS doesn't want to have a big warehouse full of quarantined Precious at all. They want people to be able to keep their family heirlooms and museums to keep their cultural artifacts. So someone has invented a scientific method or device that dissipates the stored magical energy in a Precious. It goes from an ancient scroll you can use to power a robot, to an ancient scroll that's just an ancient scroll. In short, Boukenger makes Precious into things utterly useless to the villains.
You can put me in the camp of liking Boukenger initially for "not being like the then most recent shows" No screaming Red, less wackiness, etc.
But people insisting that it's more serious and thus "better" than other shows (or using it to bash Gokaiger/Gaoranger) annoys me and has pretty much ensured forever that I will not try to revisit or like this show
Well I don't think that's a valid conclusion to draw, a show being used to bash another show must make it bad. I will say Gaoranger is perhaps better in that it actually had more story (I'm not a fan of Bouken's Deka-like episodic structure). And Gokaiger... what did Gokaiger really do better than Boukenger once you take away the anniversary stuff?
Gokaiger had an actual likable cast. Plus, the awesomeness of Gai Ikari should count for something. Plus, they were actually heroic.
This is probably a major reason why I don't like Boukenger. It was one of my first Sentai and I disliked it right from the start, before I was into the fandom. But people insisting that it's more serious and thus "better" than other shows (or using it to bash Gokaiger/Gaoranger) annoys me and has pretty much ensured forever that I will not try to revisit or like this show