I think there’s something to this.
For Final Fantasy.
And probably other RPGs.
But–
Games can have many different kinds of large-sized impacts and I don’t think they’re always correlated to length. They’re definitely not always correlated to length.
An issue with some short games–like some short indie RPGs–is they are stuck in the narrative and systemic confines of the epic scope of, say, a Final Fantasy or Dragon Quest, but don’t have the resources or skill to pull of something that matches that. They haven’t appropriately recalibrated their aesthetics (mechanical, visual, narrative, whatever) of the form they aspire to (a lot of small games languish in mimicry of larger games). A boss who you face after a game’s one dungeon and five cakewalk mini-goon fights acknowledging your skill because you’ve made it “so far” after your quest began just 8 minutes ago is ridiculous. If the game properly contextualizes such a fight by using the myriad tools for emotional engagement available to the game-maker (including judicious uses of generic and intertextual formalistic references), perhaps they can make it feel earned though.
And then, the mere form of RPGs are structured as such to deliver their emotional impact as a result of struggle with the same party of characters against the same foe. Games that set their sights elsewhere can and should have an entirely different valence. Struggle might not enter into it at all.
(I just posted about Ghosts in the Shortwave in the itch thread, a game that takes <10 minutes to “beat” and is entirely absent of challenge, but I think is going to stick with me as an impactful emotional experience for longer than games I’ve spent weeks with (and is 100% bound up in its form as a game).)
Asking whether “a game that ends in 5 minutes with the same sort of impact as a Final Fantasy?” feels to me like asking whether a short story can land with the same kind of impact as a novel. Or a series of novels. Or whether a short film can deliver the same kind of emotional experience as a feature. Maybe not, but, actually also absolutely yes.