Do people not understand how they work GCSE/A levels and the boundaries?
So they take the cohort and let's say 5% get grade 9.
They get the results and give the top 5% grade 9.
They adjust the grade boundary to make that work.
So it it's a hard paper then maybe the grade boundary is 85/100.
If it's an easy paper then the grade boundary might be 95/100.
If the year has a hard paper and they as a whole are working lower due to covid, then the grade boundary might be 75/100.
Whatever is needed to give the amount they have decided in advance gives approximately 5% the top grade.
Then they work down from that.
Obviously when you have the numbers it isn't possible to do an exact 5% so they'll look at maybe 90/100 gives 4.92% a grade 9, but 89/100 gives 5.45% a grade 9, and they have to decide which way to go.
There are some pupils that will benefit. For example if you found vectors really easy, but lots of people find it hard, and there are lots of vector questions, then you will get relative to others, a better mark so might find yourself rather than being in the top 6% which is normal for you, you've moved to top 4% so go up a grade.
If you hated the poetry on the syllabus but most people thought those were easy questions, then you may go the other way and drop a few percentage pointe, which could be enough to go down a grade.
If this cohort does do worse than other cohorts then it will be not to do with the whole year experience of covid. It may effect some schools, or some pupils more, but as a whole, it won't effect results as they will manipulate the boundaries to give similar results.
Don't start giving the pupils reason to panic/give up before they've started, on scaremongering which isn't true.