They are assuming that this is what people want, because there is nothing else editable on the market since PES died.
And the companies assume that PES died coz it could not keep up the license war with EA, which is bollox.
PES died coz they were greedy and lazy and wanted to appeal to mobile market.
Instead of running away from edit mode - company like 2K should expand on it.
Even if they released only FIFA world cup game with just international teams and made a Creation Tool, where users could build stadiums from building blocks, create leagues, teams, kits, scoreboards, ads, everything... And then they could upload it and share with other people - before you know you would have a complete game with all the leagues.
And before someone says copyright issue - you can't copyright blocks, colours, letters, shapes, building blocks.
They would just have to make sure gameplay is spot on and Creation Center has all the tools. And people would look after the rest. Like in that Tennis Game, where you can share all your creations and people are adding competitions, courts, players.