Prefacing this with an acknowledgement that I'm a public sector data analyst by trade so my experience may not be universal.

My view is that it isn't so much a lack of "self-respect and confidence" but an acknowledgment that the path of least resistance is often the best one. Often data teams are something that was tacked on as an afterthought and the organizational environment is oriented towards buying off-the-shelf solutions rather than developing things in house.

Saying that, versional control and replicable environments are becoming standard in the profession and, as data professionals become first class citizens in organizations, we may find that orgs orient themselves towards a more production focused environment.