They could just load the images and videos without the need for javascript. We know that they can do this, because they specifically made it show low-res versions for those without javascript. They went out of their way to handle this admittedly niche user base already, purposefully to make their experience worse.
Most people who don't have Javascript are using very old, antiquated browsers. The NYT cares enough about its lower-income and foreign readers to make it fail gracefully. I think that sending low-res photos makes infinitely more sense.