Does the line of text in your log really "force" people to finish it?
In some ways, yes. Not necessarily this quest in specific, but it's endemic of a larger problem Skyrim has with its quests. Quests are thrown on you without warning, and more often than not, the only option you have against it is to not do it and leave it in your quest log, so every time you open your quest log you have to sift through a bunch of quests you don't want.
This is compounded by how you don't have a proper journal. The quest log only really gives you the info needed to continue the quest, but fails to give any description or detail on what the quest is about. If you get a quest early on, after 100+ hours you're not going to remember what the quest is about very well. There's no distinction between a quest you didn't want to do until later, and a quest you didn't want to do at all.
Case in point: early on I visited Markarth and got a quest from Degaine (some homeless bum) to steal Dibella's statue. I didn't particularly like the guy, so I didn't want to do it, and all I could do is ignore the quest. Now, many many hours and 30+ levels later, I see a quest in my log to steal the Dibella statue and bring it to Degaine... well, who the f is Degaine and why does he want the statue? Why did I not do this before? Because it was too difficult, or I just didn't agree with stealing at the time? My character had grown into a little bit of a thief, so I thought I'd do it and see what it was about. It was only after I took the statue and was led back to the homeless bum (via the magic compass) that I remembered who Degaine was, and remembered I didn't want to help him. So there I was, stuck with a quest item in my inventory staring down the guy I didn't like that wanted it, and giving it to him being the only way to get it out of my inventory.
If the game is going to toss quests on you without warning (which I'm all for in certain circumstances, BTW; I do like how House of Horrors and the other Daedric quests are presented), it needs to give you more options than simply ignoring it if you don't want to do it.