Because:

1: It's Wizard's show. If they had more involvement then Wiz wouldn't have been such a Gary Stu and apparently that wasn't what Bandai wanted. They wanted a boring showboat that never loses.

2: Shunpei can't use magic since his Phantom was destroyed early in the series. Although it turned out for the best because Gates in that series tend to be completely overly emotional assholes. Losing the Phantom was for the best for Shunpei since it allowed him to support Haruto without the emotional baggage being a Gate does to people.

Even if they can never use magic and tend to screw up from time to time they are trying to help Wiz and Beast.

Will next episode of kamen rider drive be sadder?

If you have a soul, yes.

Why couldn't they turn Fourze into a dark series? Cause Fourze represents friendship, if the zodiarts had their own rider, he'd represent enmity (enemies).

And since three astronauts were involved, Utaoshi Rokuro created Fourze, Emoto created Meteor & Gamou (even though created the zodiarts) would've made a rider system for the zodiarts too.

Why do you want Fourze to be a "dark" series so much? I mean there's not much point to wishing for something to be "dark" when it was designed specifically designed not to be. Besides having a Zodiarts rider opposed to friendship wouldn't mean they would always be like that for the entirety of the show and nor would it make the show "dark" by any means.

Because Fourze aired in the year of the Fukushima Daiichi nuclear disaster and they wanted something lighthearted for the kids so they could have some simple fun and distract them from the shit that was going on at the time. That's why.

The days of a purely Dark Rider series are over. Ended when Faiz ended.And the thought of turning Fourze into a dark series? Nothing about that suit, those characters, that story, would lend itself at all to a dark series. Emotional, yes. But not dark.

Stop trying to turn Kamen Rider into Garo.

Same as why Carranger was absolutely crazy and stupid, a terrorist attack on Japanese subway cars left everyone terrified during the very serious Ohranger and Toei needed something upbeat to follow that since no one wants to consume any media that reminds them of a tragedy.

Like how after 9/11, the 2001 Clear Channel memorandum advised the removal of several songs from radio rotation that might insight imagery pertaining to circumstances of the attacks. Or why in Time Force and Transformers RID1, any imagery of exploding buildings was edited out.

Plus the fact that Toei pretty much told them they could do whatever the hell they wanted with the show :lol

I think turning Fourze "Dark" would've been for the worst, anyway. A series about overcoming odds through the bonds you make just seems to be super lame when done too seriously and melodramatic.