I happen to be a proponet of string theory.

If gravity does not exist, magnetism does not exist either.

The article you linked seems to disprove your theory as well. We are dealing with scientific models... so saying that one model which has demonstrated predictive power is wrong, in this case the model of the Four Fundamental Forces of Nature, is scientifically interesting to do for exercise, but to replace it with a less developed model with less predictive power is not the solution and not very interesting from an intellectual level.

If you wanted to say that none of the Four Forces exist and then go on to give a good reason why string theory would explain this, I would be interested, but to say that green is red because red doesn't exist... that's not very useful.