No matter what kind of training, the purpose of training is to acquire useful knowledge quickly in the shortest time. The significance of the existence of training institutions is to sort out and summarize what you want to learn, instill knowledge and skills into you systematically, and greatly shorten the time you waste inside.

Training is actually a very reasonable model. Investing in education means investing in your own future, and so does software training. Although the training cost is higher than self-study, it can greatly reduce the time cost and difficulty of self-study.

Whether software training is useful or not, the answer is useful. But training, like learning, is a combination of individual learning and institutional teaching. You need good institutions and good teachers, as well as your own efforts and interests. Some learn well, and of course some learn badly. However, this kind of forced learning will learn some skills anyway, and it is basically no problem to find a job successfully after training. As for how good the employment is and how good the future development is, again, you can't do without your own talent and hard work.