I mean I did that for almost two years but it took one Thanksgiving where people didn’t follow my diet and it was ruined. Sugar and carbs are addictive. I cook my own food and didn’t even miss baked good bread pasta rice etc (as they all cause me varying degrees of symptoms including tachycardia and rashes and migraines etc) until I ate stuffing and a few almond cookies. Apart from willpower though I didn’t have any issues sticking to a now sugar diet including fruits and processed foods.