Empirically, student free time grew for much of the 20th century, and students spend much less time on school work than they used to. The decline is not explained by students spending more time on work outside of school; much of it has become leisure time.
https://doi.org/10.1162/REST_a_00093 https://doi.org/10.1177/016146811011200908
Now perhaps there has been a sharp change in the years since those two studies (there certainly has been a sharp change in UK tuition costs), but the point is that our intuitions about how hard students must have to work these days are usually wrong.