Making the transition
From Philosophical Vegan Wiki
Being convinced of the arguments for Veganism is easy enough. Actually going vegan is why it is not widely implemented in the lives of many, and is also the reason why recidivism rates for vegans and vegetarians is so high.
It's likely that a large part of the population do want to make some sort of significant reduction in their consumption of animal products, since it's widely understood on an intuitive level, but it's often viewed as a rather daunting task for many, meaning they make little to no progress in actually achieving this.