No, not true. If many people hadn't helped me and if I hadn't read such a lot here on the forum, in peeks of the week, Digital Jester (their facts + tidbits in last PR action) etc. I would know less. I was stuck in some quests, too, because I was on the right track, but then missed one tiny little detail - I just had the advance to read English/German forum and have the German version, so I'm 1 1/2 months ahead (since start April). Times I played? Started with version 1.0, moved over to 1.1, finished with 1.2. Replayed with 1.3. Started with English version 1.4, played Act 3/4 in 1.42 and am currently replaying from scratch in 1.44 (Act 3 now).
So, it's you all here to thank sharing their knowledge, and those patient enough to respond to my wailing (Barnie via voice chat constantly, Myrthos, Raze and the Larians with a soft heart).
And there is still stuff I have not studied completely