The problem lies in the coaching, or rather that coaching is learned from a course. To get your qualification, you have to put in hours, firstly at study and then practical (a bit like how a pilot will train on a simulator and then have to log flight hours before he gets his "wings"), after which you can demonstrate that you understand EUFA's standards for how the "modern game" should be played.
At grass roots level ("EUFA C" diploma), you "learn to provide a positive developmental experience that enhances players’ enjoyment, knowledge, and skill, inspiring a lifelong desire to play football and stay involved in the game". On the "B" licence course you "learn age- and ability-specific coaching techniques to develop players at youth through to senior amateur level". Doing the "A" diploma gives you "insight into technical policy, as well as dealing with external factors affecting a team's performance and being accountable to a club's management." and finally, your "Pro Licence" gives you the skills to "develop and apply technical policy and philosophy, creating a winning team and high-performance culture".
Nothing wrong with that as an aspiration, but realise that each and every coach has spent over 600 hours absorbing the methods prescribed by the UEFA Coaching Convention which has a mandate to "set the standard for coaching in European football" by "setting high coach education standards in all UEFA member associations, in order to develop better coaches and, ultimately, better players and the overall quality of the game".
EUFA has issued in excess of 2,000 "Pro" and "A" diplomas to coaches registered with the FA and they have all learned how to organise the game the EUFA way. Is it any wonder why we are now seeing teams in L1 and even L2 trying to play like Manchester City - but if the players don't have the talent to play outside the prescribed "standards", your game plan (and therefore your instructions to the players) becomes 1) retain possession, 2) don't risk losing the ball unnecessarily and 3) wait for your xG opportunity to be high until you make an attempt at goal.