Most likely because many content creators are fascinated by the power of reviewers, and meeting a prominent one makes an interesting story! I chose games as the subject because I comprehend game dev more than creative fields such as screenwriting.
Looking at the "Let's Play" webcomic (which also seems super awesome!), it looks like that comic is about being neighbors with a streamer, who already has a girlfriend. Outside of the initial premise of content-creator-reviews-game-negatively, the webcomic starts and goes in a very different direction from Line Drop, and the characters seem very different as well.
I sincerely hope that Line Drop's surface similarity to the premise of "Let's Play" doesn't deter you from enjoying either work, since the stories are pretty distinct from each other! (:
Edit: Removed a potential spoiler