Extra functionality yes, but not a security feature. I'd understand making WSL or PowerShell a >= Pro feature, but something that is designed to secure users from malicious applications. That should be included with even the lowest SKU that can run win32 (its sad that this last qualifier is even required).

That's OK when you put enterprise features in enterprise versions. A regular user doesn't need to be able to run SharePoint, but they might want to get proper sandboxing of regular software.