Strongly disagree with this. I know 50 people that think they can learn to do Data or something with an Udemy class and end up doing nothing.

I think the negative picture painted by the author masks that the company is placing 50% of graduates which mostly paid nothing for the education they received. Lambda is not high quality education, but its super cheap and higher quality than just reading a Knuth Book, or Skenna's algo book which has no completion rate.