I'll bet you that 90% of the time you hit up Wikipedia you'll only read the top paragraph. At least that's what I do and I've seen more people use Wikipedia like that.
In fact, I love duckduckgo's 0-click result because of exactly that.
Wikipedia is not very consumer friendly. It's dull looking and the entries are usually filled with a lot of text.
That you read the abstract at the top of the article suggests to me that the article structure is very efficient (and arguably consumer friendly) in that they provide the TLDR summary above the fold, which nullifies the problem that the full article may have too much text.
By the way, my use case for Wikipedia tends to have me reading the complete article more than just the abstract, because I'm usually in research mode when I use Wikipedia. Of course, everyone has a different use case, and I suspect your use case is more common than mine.