Why can't the Dutch champion advance directly to the Champions League?

The Dutch champion cannot directly advance to the Champions League and needs to participate in the qualifiers. The Dutch League has three Champions League places, and champions of other European leagues also have the opportunity to participate in the Champions League. Therefore, the champion of the Dutch League needs to play from the third round of qualifiers. The champion of the Greek League and the 10 teams that stand out from the second round will be decided by drawing lots, and the winning six teams will advance to the final round of qualifiers. These six teams will compete with Czech and Swiss champions for the last four places in the Champions League.