Still, any good data scientist I know actually knows to read the documentation carefully and has learnt regularisation is the default.
For example, look at the neural network classifier model in scikit-learn: https://scikit-learn.org/stable/modules/generated/sklearn.ne... None of these defaults can be assumed. If you showed me a function call with no optional arguments I couldn't tell you, nor anybody else that hasn't read the documentation, what activation is being used, what optimizer, learning rate, etc... In fact when coming across these kind of models during code reviews the nature of these parameters is the first thing I ask about.
To the point of exploratory analysis in some of the parents ,I prefer statsmodels for that purpose. It's not quite up to where the similarly purposed tools are in other languages, but for most of my work where I care about interpretation, it hits the right spot between usability and providing the standard statistical outputs.