I get your point but it's more of a perception that games in CL group stages aren't important. They are vitally important IMO, getting off to a winning start and getting the group won ASAP is critical. It allows the manager and team more space to focus back on the league before the knockouts come around. It also means that key players can be rested in latter games if needed. Also, winning the group is important as it can help avoid tougher teams later on. For me, there is still some weird apathy from City fans to the CL, until the very latter stages when all of a sudden everyone wants tickets and complains when they can't get one.