Hello DutchTD076,
I agree with Dave.
When a tournament scores around 70 entries, there is a big change that only the final table will get paid, so if the last two tables remains for a long time, you ensure equity for all players since they are playing againt the same amount of opponents and not posting blinds quicker than the other table.
The wording I use to explain this to players : Final tables should have an odd number of players.