There is indeed a saying that the zodiac signs are inconsistent.
As for whether we can be friends or whether we can get married, there are many factors that influence it. Birthday is just one of them, so it is difficult to say that just because the birthdays are not compatible, we will definitely not be friends or get married. For example, although the birthdays are different, but the birthday of the other person is your favorite god, then the bad influence will be greatly reduced, and it is possible to become friends or get married.
So the impact of incompatible birth dates must be considered, but do not exaggerate.