By that time, it is supposed that transaction fees will compensate. No one can predict the future, if they do no problem, if they don't there is a problem.
By that time year numbers are all less than 2016.
No one can predict the future.
If last six year numbers were all less that 2016 - there is no problem to think that this is true forever

Do you see logic here?

If adoption of bitcoin remains constant (as of now) there needs to be a transaction backlog in order for fees to compensate.