In all seriousness, there is a step up in expectations at secondary.
Students are expected to have their uniform, anything they need for the lesson, and manage their own belongings.
For a lot of students this is something they get worried about, but for the vast vast majority after the first week they are fine.
For those who are not fine usually pastoral support or the Sen department will step in - I have taught many students with autism for example where I kept a maths pencil case and calculator for them that school provided.
It's a step on the road to adulthood, as is learning to manage PE kits, lockers, bus passes etc. for most kids it's a big step up in independence.
The teachers have a much less personal relationship than at primary. At primary in general one person teaches 30 kids for the whole year with maybe some specialists for art or French.
At secondary the teacher might have 7 classes of 30 kids each. Speaking personally, even with a really good memory it's hard to get all the names quickly.
Again, this is a stepping stone so that the students get better at managing relationships with larger numbers of people because as they progress to college and then to university there will be more and more independence but also bigger classes. University lectures can have up to 400 people and the student needs to have learnt by that point to turn up with what they need and how to learn from someone they don't have a social relationship with.
The same teachers who the year 7's think are scary are the ones the year 11's are doing handmade cards for at the end of GCSEs because they have got the grades they need to.