Half of my income is from training people in JS and Python. I have 50% of those missions that are requested to be "advanced" courses.
The vast majority of the participants are not up to the task. They are paid professionnals, but they consistently overestimate they level, skills and needs. They often are not very good, and of course, they don't know what they don't know.
So I always check for that first, and rewrite my course on the fly to include the untold pre-requisites I identify. I don't tell them I do this to avoid making them feel bad. Nobody wants to hear "dude, you wanna learn react and you never used an arrow function, wtf ?" even if being comfy with JS is a listed requirement on the site.
Bottom line: most devs are not experts, and don't have the ability to assess that. But more importantly, it's enough for them to be productive and most industries don't need more.
The vast majority of the participants are not up to the task. They are paid professionnals, but they consistently overestimate they level, skills and needs. They often are not very good, and of course, they don't know what they don't know.
So I always check for that first, and rewrite my course on the fly to include the untold pre-requisites I identify. I don't tell them I do this to avoid making them feel bad. Nobody wants to hear "dude, you wanna learn react and you never used an arrow function, wtf ?" even if being comfy with JS is a listed requirement on the site.
Bottom line: most devs are not experts, and don't have the ability to assess that. But more importantly, it's enough for them to be productive and most industries don't need more.