That's not entirely accurate...customers are often advised to avoid initial model year after refresh/introduction by various sources. It's not FUD targeted only at Tesla, it's commonly given advice for people who absolutely do not need to buy a car immediately or who aren't jonesing for that brand new model. Cars unpredictably have failures, even from well-reputed makes, that often do not show up u too the vehicle is in wide use. Giving it a year lets the leaseholders and people who absolutely HAD to have the car the first year test it out for you and find them. Most cars have a small spike in recalls and TSB type issues after a refresh, some have a LOT, and it is often completely impossible to predict.
For example, to use a car that was a relatively recent introduction for Ford, the Fusion had an initial spike in recall issues when introduced, despite being based on the Mazda 626, then had spikes in 2010 when a new power train (particularly new transmission) was introduced during a refresh, and again in 2013 when they had a platform and power train change. Ditto on the Escape, which are both vehicles selling ae Undo the numbers Tesla is anticipating. And this is no isolated issue at Ford, it happens with carmakers all around the world of all pricing and quality levels.