
Like, there are several ways to hit us with the emotional damage, you don't have to make the safeword the method to inflict it lol
And what's sad is that I can't recall, at least in recent memory, a single BDSM or domsubverse series that doesn't use this trope. First couple times I could chalk it up to them just not knowing, but atp it's an immersion breaker and disappointing.

Kuroi Yodaka has a good one called Praise Me When I'm a Good Boy. It's domsubverse where both the sub and dom struggle with feeling comfortable fulfilling their needs and I'm p sure they don't use "I love you" as a safeword at least lol
Yodaka-sen is also just one of my fave bl mangaka of all times rn. You should check their other works, too, if you haven't already lol
But the point of a safeword is for it to be something you wouldn't normally say during sex or could be mistaken as encouragement to continue.
A lot of BDSM centered stories do this trope where they make "I like/love you" their safeword, and I get *why* to a degree, but it immediately sucks me out of the moment every single time. It's why the fucking "pineapples" thing was a running joke for so long. It sounds silly af but it's a good example of what to use. It's not only a word you wouldn't say in the heat of the moment but it's also good at breaking the tension 'cause of how nonsensical it is. No one is gonna continue a hard-core play after hearing someone shout pineapples lol
I just wish bl authors would understand why safewords are so important just a tiny bit more and not treat it like an emotional crutch plot point.