Saying that linear regression is easier to do properly than more complex methods like random forests, DL, boosting etc is like saying that people should code assembly instead of python
Broadly, whether you should move from OLS to random forest regression = SNR increase / increase in manhours and money spent.
The GP compares python-vs-assembler and random forests-vs-linear-regression but the analogy breaks because python produces assembler and increases the programmer's general certainty concerning what they are doing. Random forests don't make their user more certain of the results as an application. Basically, Python is a relatively "unleaky" abstraction whereas complex AI algorithms a very "leaky" abstractions.
My personal suspicion is, in a market full of people who are using ever more sophisticated algorithms to ratchet up their customer conversion classifiers' F1 scores by .001 per iteration, the leader will be the company who's decided to steer clear of that quagmire and spend their time and money on identifying new business opportunities instead.
which could be seen as retrograde vs assembler (but not really for the very funny and brilliant code above - you have to see in formatted nicely and run it to realize that there are some great people out on the web!) perhaps in fact I would agree with this dig - some people do write horrid bits in their python code and python seems to facilitate (or enable) this behavior rather more than other modern languages like Julia. But taking your comment more at face value, reading it to say that more complex methods represent an evolution and that they should be accessed by users as they are easier or better I would disagree. It is easy to screw things up with a random forest or a booster in the sense of overfitting, focusing on the method and not the features and not understanding what the model extracted is telling you about the data. Often a regression model or a decision tree can reveal that there are a few simple things going on which say more about how a process or system has been implemented than the generating domain that that process or system is operating in. This can be gold dust. So, I think that they can be easier to use and simpler to understand, of course when they don't do the job better model generators are required.