Your question touches on a widely discussed and often controversial topic in urban design. Yes, such park benches do exist. You are referring to a specific design feature commonly known as "hostile architecture" or "defensive design.
These benches are intentionally designed with armrests, dividers, or other elements in the middle to make it impossible for a person to lie down across the length of the seat. The stated goal from municipalities or property owners is typically to maintain order, ensure benches are available for sitting, and discourage long-term occupancy or sleeping.
However, this practice sparks significant ethical debate. Critics argue that it's a targeted measure against homeless populations, making public spaces unwelcoming and failing to address the root causes of homelessness. It prioritizes aesthetics and perceived security over human dignity and the basic need for rest. Proponents may view it as a necessary measure for public safety and preserving the intended use of street furniture.
Ultimately, the presence of these benches raises deeper questions about how we design our shared spaces and who they are truly meant to serve. It's a physical manifestation of a complex social issue, sitting right in our public parks.