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Well, all I can say is living in a convent will solve any concerns regarding sex, nudity, profanity...etc. because you are with like minded individuals. This means you don't buy M rated games..... a sacrifice you should gladly perform to keep your innate sensibilities intact.
You can surely see the advantages.... no temptations. Though, even here, curruption is enevitable.
Admittedly, EA wants to reach the largest number of players in the gaming market. However, the "gaming market" is made up of varying group levels... meaning children, young adults, and adults... also meaning that game design is taylored with these realities (ie:to comply with game ratings). Bottom line is that a game publisher will attempt to design a game that stays within the rating system but also to maximize sales within that group(s).
Asking game publishers to take time to design a game with toggles that includes or excludes content is time taken away from designing my M rated game... time that can be used to polish, debug, even add content, before the game launches. What time, you ask?
Think of the dialogue writers, for one. Their workload just increased. They now must include "clean" and "dirty" dialogue. You are asking them to change an original personality into a schizzo, to appease to a minority. Add a workload to programmers that now must include checking the "dirty toggle" against the dialogue flag. Voice actors that are now paid extra for the "clean" line... etc.... etc...
At the end of this discussion, unless a game publisher is willing to design two games within one, whose price point may be above what consumers are willing to pay..... it ain't gonna happen.
So, why bother even starting this discussion?