I am developing a Pythonic alternative to ArgoCD and FluxCD that uses no CRDs or in-cluster controllers for continuous delivery of applications to Kubernetes clusters
OMG! No! Having dealt with Go templates in the context of writing Helm charts, I would say this is not a a great idea. Please, invent a better templating language for Go, and then perhaps go down this path. That being said, I am not a great fan of templates in any language. Jinja2 might be a heck of a lot better than Go templates but it can still be hard to get right.
There is no protecting against pre conceived notions. If a Typescript programmer, for example, expects Python to behave like Typescript then that is on them. Typescript has types. Python has type hints. RTFM for God’s sake.