They’re no better than gameplay visuals and we’d be making ridiculous revisions if we treated game descriptions as any more accurate a source as what we physically see by your own arguments when other feats were mentioned. Where’s the proof one is more trustworthy than the other anyways?
Yes they are. By a long shot. If this was a cutscene, you might have a point. Not for gameplay though. Where is the proof? The fact that a boss has different movesets than their playable counterpart. The fact that characters in cutscenes fight differently than in gameplay. The fact that it is inconsistent with the manga (see Kaeya using a sword made of ice). Using animations limited by viability within a game, rather than their description is fairly absurd tbh. In the case of Sucrose they even went out of their way to specifically add that. All the other catalyst users (with only few exceptions) have the exact same description.
"Gathering the might of Geo, Ningguang plunges towards the ground from mid-air"
"Gathering the might of Hydro, Mona plunges towards the ground from mid-air"
"Gathering the might of Electro, Lisa plunges towards the ground from mid-air"
"Gathering the might of Hydro, Barbara plunges towards the ground from mid-air"
"Gathering the power of Pyro, Klee plunges towards the ground from mid-air"
"Gathering the might of Hydro, Kokomi plunges towards the ground from mid-air"
The other two that dont quite fit are:
"Gathering the power of Pyro, Yanfei plunges towards the ground from mid-air"
"Plunges towards the ground from mid-air, damaging all opponents in her path with thunderous might." (Yae Miko)
So yeah, they probably put that there by accident.
We have statements that they cover themselves in their element and we have cutscenes where we see them doing it. We have statements contradicting gameplay. We have the manga contradicting gameplay. We have gameplay contradicting gameplay.
This isn't even mentioning that we treat gameplay as very iffy to begin with. While not unusable, it certainly doesn't take presedence over [insert basically anything else]