It's better to look at it in terms of the alternative.
Kids in and out all over the place, isolating, getting bits of lessons here and there from teachers expected to do both classroom and remote teaching, from ill teachers, having cover teachers, not knowing how often this would happen over a year - maybe 2 weeks isolation, 2 days back, 2 weeks isolation on repeat.
OR
A plan to have socially distanced classes 2 days a week, fewer households mixing, 2 days of face to face lessons, a day a week for teachers to plan for this with videos and work packs to support learning at home the other 3 days.
Ie, a teacher plans a rolling programme of 2 days full time lessons, 3 x 5 minute videos and tasks/sheets/whatever to do with that 5 minute video to support. Time to go through that work when in school.
Not ideal, but more organised than the first option.