I think you are perhaps enured by your experience daphne. Many teachers don't want change and I can understand that because schools, in my experience, are some of the worst places when it come to introducing it. However, change can happen and must so that we can move forward. All you are offering is a negative response. We need to have more use made of technology and online learning too so that we can call upon the best in their subject.
I don't see why a teacher, for example, needs to take a homework class at the end of the day. You do not need teachers carrying out the pastoral side of schools and schools have, in my experience, already changed to none teaching staff in some areas. Teachers need to be marking and preparing in this time. With the sort of day I propose, with teaching at the core, some flexible working is possible for teachers.
You may believe the beginning of a new stage cannot be done in lecture form with the use of teachers being much more one to one following up but I don't think it is impossible if the will is there. I really don't believe if we came back in 100 years schools would look the same as they do now any more than they looked the same 100 years ago. We have to find some way to move forward rather than resisting every step of the way. What tends to happen is they younger workers (in any industry) know what is currently happening as normal and ignore, to a great extent, the complaints of the old that it 'isn't what it used to be'. They take if forward generation by generation but someone has to think outside the 'what it used to be' area.