While I understand how you are parsing that, I'm not convinced that is what IFAB was trying to say. Alas, they are so consistently imprecise in their language, Lewis Carroll's head would spin.* I don't think they meant to imply that the interference was itself an "offense," but simply to mean that if the player commits a DFK foul, then the restart would be a DFK. It really doesn't make sense to say it is an "offense" for a player to play the game when the player hasn't been sent off--and may not even know he will be. But I can't argue with your linguistic interpretation. And more often than not, the restart is going to work fine, as the IFK is often a relatively innocuous restart. (I can't promise that, at the level of games I do, I wouldn't find an alternative "interpretation" if I felt that IFK was going to be fundamentally unfair.)
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*"'When I use a word,' Humpty Dumpty said in rather a scornful tone, 'it means just what I choose it to mean — neither more nor less.'"
--Alice in Wonderland