  We consider a model arising in facilitated Rydberg chains with positional
disorder which features a Hilbert space with the topology of a $d$-dimensional
hypercube. This allows for a straightforward interpretation of the many-body
dynamics in terms of a single particle one on the Hilbert space and provides an
explicit link between the many-body and single particle scars. Exploiting this
perspective, we show that an integrability-breaking disorder enhances the scars
followed by inhibition of the dynamics due to strong localization of the
eigenstates in the large disorder limit. Next, mapping the model to the
spin-1/2 XX Heisenberg chain offers a simple geometrical perspective on the
recently proposed Onsager scars [PRL ${\bf 124}$, 180604 (2020)], which can be
identified with the scars on the edge of the Hilbert space. This makes apparent
the origin of their insensitivity to certain types of disorder perturbations.
