Babylon 5 wasn't perfect, but it sure did do things that Trek would never have so much as considered, didn't it?
Voyager's
'Rise' features asteroids being hurled deliberately at a planet.
A "planet of the week," though... not a major player's world.
DS9, eventually, did some "exciting" things, and ENT (in the third season) finally started to do some exciting things. But TNG and VOY really didn't. There was never any feel, in either series, that there was any real jeopardy.
(OK, TNG did this once, with "Best of Both Worlds Pt.1," but they basically wasted the opportunity... the end of BoBW left me with a bad taste in my mouth. AT LEAST they should have let Picard not be recovered... or done SOMETHING that gave up real, in-story consequences we'd care about! Picard was right back in his captain's chair... which really, really bothered me.)
"Rise" toyed with the idea, but it wasn't really consequential. (I saw this episode just a few days ago... I've finally decided to "Netflix" Voyager, since I never saw much of it on-air.)
Voyager really had a few "pseudo-consequential" events... but none that have any long-term impact on the Star Trek world.
Enterprise did a lot more, but we knew that (barring "temporal cold war" issues) everything was going to end up how the production team imagined it "always had."
Babylon 5 took one of the main races and just devastated them... and kept us watching the results of this devastation for the remainder of the series. That's what I'm talking about when I talk about "risks."
(Of course, you can carry that too far... destroying Vulcan in a movie, just for pure "shock value," isn't something I'd ever have done, and not something I approve of. The destruction of Vulcan in ST'09 was just there as "setup" to create the concern over saving EARTH, after all, and served very little other story-telling function.)