I personally train TCMA. I practice forms. Do I think forms can teach you to fight, yes. Do I believe you can learn to fight without forms, yes. If you say forms are obsolete, and you can gain the same benefits without forms, maybe. But would it be easier or more practical, I dont think so for everything.
An example would be going low in forms. Before I trianed TCMA I always used high stances. JUST by doing my forms as low as i can, I gained flexibility, stability, muscle strength, balance, stamina and quickness and numbleness with my footwork. Plus I can easily take a lower position than an opponent, and move in that position without being warn out quickly. To gain all that without practicing forms, I guess I could do lunges, run, jump, weights, stand on horse stance for hours, and stuff like that, but I was able to gain that with forms without the monotony of doing the same thing over and over as I practice many different forms to go though.
I also practice forms as shadowboxing imagining multiple opponents. How did this help? it helps you discover applciations hidden within the forms and how to use them, and honestly with this practice, after time they just come out. Sometimes I will change soemthing in the form to experiment with applications, and always use different scenarios. Can you do this without forms? Yes. Forms is just the way I prefer, because then I dont have to do it individually since Im already practicing my forms, so its a time saver. The applications do come out by themselves, but I also am now practicing applications, and supplimenting with Push Hands for sensitivity, and the Snake and Crane games for getting through the opponents defenses. I also practice Chinna reversals and a little ground stuff to supplement the training.
It also can be broke down and put into drills, which I agree with, and then you could say you no longer need forms, but my teacher, who been practicing TCMA since the 60s said he still learns things from disecting his forms. SO if thats the case, your abandoning possibilities by stopping and just practicing drills. Is drills good to practice in addition to forms, yes. Will it make you a better fighter? possibly. Is that the extent of the usefullness of forms? no... I will always practice forms until I die, because of health benefits, the time reduction because of the lack of need of other trianing, always training applications, and the fact theres ALWAYS more to learn.
In addition I do supplement my training now with cardio, as in doing forms fast, fajing training, Qigong, weights, as in medicine balls, and resistence training, wooden dummies and heavy bags, and jogging, as I learned that just forms alone may not always be enough, but they are not useless tools or just menus of techniques. That is a limited view of the whole of forms.
Forms also do help with maintaining health and flexibility into old age, prevent arthritis and other such chronic ailments, increase lung capacity, help relieve stress, strengthen the body, etc. You can get these benefits with other exercises, but why do those other exercises if your already practicing forms?
This whole argument is relative to the speakers point of view. I am defending my point of view, it is not a wrong point of view, just different than others. Thier point of view is not wrong niether, just please try to see the whole picture. If its not relevent to your training thats fine, but it is relevent and it is not obsolete just because it is not understood.