More support is just one plank...
More support = more advertising opportunities for companies = better sponsorship deals = better earnings for players and coaches = more motivation and dedication = better futa for all.
There is also management of soccer...
Better management at national level = better vision for national teams/clubs = well organized league = properly working disciplinary/grievance system = more security for matches = less hooligans = more people enjoying matches = even more support Etc
Just thinking...
Great men are not always wise, neither do the aged understand judgement...