That's not true. 14 days is the legal mandatory EU return period for online purchases. Any longer than 14 days is a voluntary courtesy from the shop, like 30 days from amazon.
Also returns don't apply to hygiene senzitive products that are worn on the body, products tailor made or made to order, so those Zeiss lenses tailored to your diopters or the facial interface sized to your face plus the hygiene angle where the strap and facial interface on the used items will be full of sweat and oils, might legally disqualify you from a refund.
I'm sure Apple has taken steps to account for large numbers of returns and have a program to refurbish and resell them back on the market, but based on these limitations they're not mandated to accept them by law.