The Four Knights Game is an opening that is suitable for chess players who like to operate from a secure base. Games in which both sides have completed their development before "getting down to business" are typical of the Four Knights Game. Small inaccuracies are then often decisive. Of course, these are necessary if you want to play for victory without taking any risks. The Four Knights Game is therefore more of an opening for players with experience. In order to be successful with the Four Knights Game game in the long term, it is necessary to be fully strategically as well as tactically prepared. So: the Four Knights Game is not an undemanding or harmless opening, rather the opposite: if you don't know much about the Four Knights Game, you won't have much fun in this game.
Conclusion: you are welcome to study the Four Knights Game more intensively if it fits in with your other opening repertoire. Then you always have an additional, often very unpleasant option to avoid your usual paths. And this can be a lot of fun, especially if it is played from a safe starting position.
Do you have an "appetite for more"? Would you like to learn this opening? You can find specialised opening training courses here: Four-Knights Game (chessbase.com)