7 is an important number across many cultures which pops up again and again. So is 8 (Eightfold path, 8 days of Hanukka, 8 Beatitudes, 8 Gates of Heaven). So is

7 is an important number across many cultures which pops up again and again. So is 8 (Eightfold path, 8 days of Hanukka, 8 Beatitudes, 8 Gates of Heaven). So is 6 (6-pointed Star of David, 6 Days of creation, 6 Articles of Belief, 6 Ministries, 666). So is 5. So is 9... There are many more things to be counted than there are numbers to count them with. Saying everyone decided on 7 stars because they just all liked the number 7 doesn't pass the sniff test.