  We observe that in many F-theory models, tuning a specific gauge group $G$
and matter content $M$ under certain circumstances leads to an automatic
enhancement to a larger gauge group $G' \supset G$ and matter content $M'
\supset M$. We propose that this is true for any theory $G, M$ whenever there
exists a containing theory $G', M'$ that cannot be Higgsed down to $G, M$. We
give a number of examples including non-Higgsable gauge factors, nonabelian
gauge factors, abelian gauge factors, and exotic matter. In each of these
cases, tuning an F-theory model with the desired features produces either an
enhancement or an inconsistency, often when the associated anomaly coefficient
becomes too large. This principle applies to a variety of models in the
apparent 6D supergravity swampland, including some of the simplest cases with
U(1) and SU(N) gauge groups and generic matter, as well as infinite families of
U(1) models with higher charges presented in the prior literature, potentially
ruling out all these apparent swampland theories.
