I value your answer, and in parts I agree, but as you can see here in this very thread, people say "take innovative ideas because the events give monarch power". This is a very important information (because MP is so scarce), but it's NOT in the game (in the UI at least).
Actually, I am the guy who said that, amused that people were ignoring a major game system in the game engine that affects all parts of the game. It is entirely possible that nobody else posting in this thread knew, but the point is, everybody posting in the thread with experience of prior PDS games
should know about the importance of events, even if they did not know the specific events for idea groups in EU4. I mean, it is one thing to list a factor and say "I don't know how important it is, so I will concentrate on what I do know", it is quite another to ignore it altogether.
Thus people are picking national idea groups based on invisible knowledge. Surely not an effect Paradox wanted. After all, they strive to put all relevant information into the UI.
People are
thinking of picking national groups wishfully in anticipation of release and choosing only to focus on the few bits they are certain of in making their choices. This is an entertaining sport, even as it is done without a full understanding of the ramifications of their choices when we
disregard events, and I completely understand it. Once the game is released, a lot of players will be experimenting and many of the more interesting details will become widespread knowledge, based on which a number of very different conclusions will be reached as to what is important, resulting in different schools of thoughts as to which idea groups are the best.
A simple tooltip telling you that idea group X will facilitate events that give money, or MP, or beneficial colonial events, would have been enough for my taste.
Except that that is not all that they do. Were they, I would agree with you, but it is not the case.
Every single idea group is tied to many events, some good, some bad, and having to do with different aspects of the game that are related to the the abstraction that the idea group represents. To cover the important events, you would need something like a tooltip for colonial ideas saying "Colonial ideas allow events that have to do with colonial ideas and how people react to them", "Trade ideas allow events that have to do with trade ideas and how people react to them" and so on and so forth. And that is apart from those 39 event files that are not specifically devoted to idea groups, but in which idea groups are important for one or more events. Or you could choose a few of the events and write a tooltip based on those, but this would not be representative of the events, and might change depending on DLC and mods.
There is no idea group that merely facilitates a certain aspect of the game. Pick idea group X, and you open yourself up to all events that have to do with X.
But, you might say, focus on what is important!
And I quite agree that a simple tooltip would be useful if it could adequately describe the effects, but I just do not see how this can be done when there are so many varied effects, many of which will have different importance to different people. Taking innovative ideas as an example again, being innovative also puts you at risk of
losing stability because people are upset over the rapid changes etc. So, what is now the most important thing for you - the possibility of gaining monarch points via events or of losing stability, something that has a substantial cost in AMP (depending on religious unity, religious idea group, and other modifiers)? Writing that "Innovative will facilitate events that grant monarch points" would feel rather awful if you were unlucky enough to mostly get the negative events, as I am sure you will agree.
But those MP gain events are possibly the best events one can get (from what we now at this point).
Innovativeness events are very good general purpose events (everybody needs monarch points), but a realm that e.g. concentrated on trade might well consider some of the beneficial events associated with trade more powerful, and so on and so forth.