OP hadn't been responding to any claims about being "truly life changing" he was addressing the point regarding what parts of his day are now reliant on AI such that his work would be more difficult without it.
You're the one holding him to a standard that it be "truly life changing" when that was never what he was addressing in his comment. (You're also the one adding emphasis that increases the requirements to overcome the authors, and your own, doubt). And who are you to say that these things didn't truly change the OP comments life? Not having to look up implementation details could be a time save for them on the order of hours per week. That could free up time for him to develop a new hobby, start working out, or any other manner of things that could literally change his life. You're not the only one who gets to decide what life changing means.
Also, it really is worth reflecting on the fact that we are where we are as a society because of a bunch of cumulative "I'm X% better at my job" advancements. That's literally one of the main through-lines in technological advancement since the stone age. Another through-line is that technology (even "truly life changing" technology) is frequently over-hyped. There's really nothing new going on here.