@unsure:
Just going to leave this here (from the very article in the link)
"Even if they have been investigated and approved by the Church, the Church does not give any absolute guarantee to their authenticity."
Yes.
These physical evidences are not dogma. No Catholic is obligated to accept them.
They are defined as private revelation instead of public revelation.
Primarily they are only relevant for the people directly involved.
Actually there aren't a lot of dogmas in CC, basically all dogmas (which are public revelations) are defined in the Apostles' Creed.
The most recent defined dogma dates from 1950: the Assumption of Mary.