Field’s require & validate interaction

Hello I noticed that fields that have a validation apply it when the required properties are not met, is there a filter available to disable that? (I checked the docs but all of them seemed to be to target a single field, I need something global)

And second, if a field is hidden because it doesnt pass the requirements, is the recieved value in the request still saved to the database?

E.g. If a field does not pass required conditions it should not run the validation, and the field should be saved as empty string in the db, is that something achievable?