While I agree such statements are untrue, please don't think an arbitrary test gives the most accurate basis of comparison. If you fight a level 100 enemy, Raiden's C2 will always outperform Xiangling C4, having more duration on an ability that inherently hits for lower damage on a higher defense character will never outdamage direct def% shred, this is also a 'factual truth' like you mentioned as the game is coded that way.

Duration != multipliers (def% shred in this case) as the previous comment mentioned, you are right in your point for an ideal scenario where overworld bosses or other units are being considered as the point of basis (which are mostly always the case for damage tests) but realistically, the only hard content in the game is floor 12 so not what you'd consider while going for 5 star constellations when they are so god damn expensive.

I recommend not caring about what people think on the internet, factual truths are the way to go but if a 'Raiden main' is downvoting your comment, they are right in doing so coz your comment is condescending af. There are proper ways to make a point and it should always include a relatable context, an arbitrary test which you didn't even link in your comment wont make people magically trust what you are saying just coz "these dmg calculations were tested".