incorrectDefaults in SchemaUtils is always true for nullable columns without exposed defaults in MySQL/MariaDB

[spand]

The cause is that nullable columns are always implicitly default null. I am not sure what this should mean in terms of Exposed. The question is then

1. Should exposed be aware of this limitation in MySQL/MariaDB and consider nullable exposed columns without default values the same as columns with default null ?
2. User error. User should not declare tables in exposed that cannot be expressed by the underlying database.

Thoughts?