It really can be. Although there are video materials for self-checking your solutions by analyzing common mistakes, and two individual reviews by the course curator – for the solution before watching the video materials and for the correspondingly improved solution - after watching. Depending on the individual characteristics of the perception of a student it may not be enough to fully understand the topic of the lesson. Someone does not perceive the information well on the recorded materials, and an even more individual approach is needed, and most importantly – live communication with the curator/mentor. Someone has a slightly different rate of perception - faster, or slower. Someone needs more reps. Someone needs the information in a more concise format.
We do our best to prepare the materials as universally as possible while going for certain simplifications. Unfortunately for the declared price, we cannot afford to devote more time to checking tasks. As an exception, we can check one or more tasks more than twice, so that it is easier for you to feel and find your pace of training, and adapt to the maximum. And then, if you need more than two task reviews, you can simply pay for the course again to increase the number of task tests from 2 to 4. And so on, by analogy.