Self defence techniques such as Krav Maga teach you the exact same, while also teaching you how to actually defend yourself in a variety of scenarios.
And there is some utter nonsense out there, definitely. But we're hardly unique in that.
(b) Krav Maga is clearly a highly time- and energy-efficient tool for hand-to-hand combat; why should any martial art strive for any different metrics? (other than coping with exceptional circumstances via malicious compliance, such as that old French martial-art that focuses entirely on kicks not fists)
(b) has been treated extensively in many discussions. These usually are usually oriented around the role of conflict in daily life and the suitability of these arts as a way of dealing with them, for instance.
Good grief! I can't imagine the amount of paperwork that would accumulate if fighting was a day-to-day occurrence in my life (except in Army during wartime, where assault is the job instead of a crime).