I've had the same front loading washing machine, with this type of gasket, for 16 years; I have never dried the gasket when the wash is complete, just left it as it is, and never once has mould appeared anywhere on the gasket. I've never once run a self cleaning programme, most of the wash cycles I do are unheated, meaning in cold water, with one hot wash weekly or fortnightly for certain items, always using liquid detergent followed by fabric conditioner. The dispenser drawer does get mouldy and needs cleaning, but I don't see mould anywhere else. BUT, I never close the door on the washing machine when its not in use, its always left pushed to, but slightly open, and perhaps that's why, so if you've been keeping yours closed, don't.
We have high humidity here most of the time, but not heat - if you live somewhere very hot and humid, I'm guessing that might encourage the problem.