isn't it basically their fucking job to suffer through shit so i don't?
Yeah, cuz it's their JOB. If game length is the issue, delay your review or convince the devs to send a review copy earlier.
Their
JOB is to experience the game and share that experience. Their expertise is their ability to articulate that experience at a level above most people. They're expected to have a broader idea of game design concepts, like the current limits of how visuals and audio and storytelling techniques are presented, etc...
There are many reasons that aren't even remotely due to laziness/unprofessionalism for someone to not want to finish a game -- a piece of entertainment media -- over the course of experiencing it.
If a reviewer just gets fed up with a game and decides they don't want to finish it, that's a great and legitimate premise for a review. Their
JOB at that point is to put into as detailed writing as possible why they came to that experience -- like maybe they can explore contrasts to other recent games they liked and why that was so much more effective for them, explore their own tastes and why the current game isn't doing anything for them, etc... That's still all useful info that serves the purpose of a review to the reader.
Start to finish experience is arbitrary. There is, indeed, untouched content in that review, but knowing why the reviewer decided not to keep going is still absolutely serving the exact purpose of a review.
Reviews do not measure back to some unchanging, universal standard. These reviewers get paid to tap into larger culture and how the media they experience fits into it -- that's actually their job. Their job isn't to get from start to finish -- but don't take me saying that as it isn't
valuable to get from start to finish -- it's just not
necessary.
Why do people think this is edgy and/or unprofessional? lol
They're getting paid to examine media and explain how it fits into the culture surrounding it, what value it has to them as individuals and perhaps even suggest how it has value beyond themselves. That can be done without going from start to finish, even if the review ends up positive as a result, but hey, it's also nice when it is from start to finish, too!
EDIT: also worth pointing out that people saying they would get fired for not completing their task are mostly missing what I just said about how reviews work. Being tasked a review is being tasked with articulating your experience. That's the job, period. The experience doesn't have to be start to finish of the game's main content line -- it's sit down, explain to the reader how you felt about it by whatever angle you want to bring to the table.... that's it. They're doing their job. Just because there's a lot of flexibility and autonomy for the writer in it doesn't mean it's not an effective review.