If iFixit was sticking to things like computers then the person's comment about it getting "tiresome" might fit what you said in your post. But when they tear down equipment that you aren't going to upgrade, then the only possible reason is for repair. This is what feels "tiresome" to the poster. Who is really going to repair their mouse or trackpad? Sure, there are people out there. But maybe 10% of the people who buy a Mac would open it up and change out hardware. Most of the people who like to build computers build Windows or Linux boxes. Out of the Mac 10% who do open up their Mac, how many are going to open up their trackpad and replace a battery or sensor? Again, maybe 10%? I don't know a single person who has opened up a mouse to swap a battery. I only know 1 person who has opened their iPhone to change the battery and then wished he hadn't spent the time/money because he replaced it 6 months later. So when you are looking at 1% or less of a user base, it gets "tiresome" when it is treated like "cool news". They are trying to remain relevant and they are making themselves less so.
Speaking of "tiresome", I kind of feel that way about this long post of mine....maybe I should just delete it....naw.....whatever