But what if they were? Nobody knows, so we should gather enough data to make informed predictions and preparations.
Right now, there are so few full 1MB blocks that we have no idea how the system would react, especially to much larger ones.
Since you refuse to answer on the other topic I will ask here:
How long do we gather and analyze data after we get full 1MB blocks? 1 week? 1 month? 1 year? 5 years? How do we decide that we had enough data to analyze the issue?