Yeah, that's why capoeira should be regarded more as a dance, not as a means to self-defense.
False.
Capoeira was started by African slaves; the "dance" part of it was used to hide its true deadly intent in plain sight of the slave-masters. In the 17-19th centuries, capoeira fighters were used as mercenaries/bodyguards with such deadly effectiveness, its practice was officially outlawed.
In a real street fight you would NEVER use any of the moves you saw in the video A4s posted above. Today, the "dance" part is used to test your strength, agility and reflexes, just as any other martial arts style has its "show off" moves designed to do the same. Just as any other martial art style, capoeira can be brutal in the hands of the right person. Incidentally, last night I saw my instructor fight in an MMA tournament, and he absolutely destroyed the BJJ guy he went against.
That all said, it's always best to study more than one fighting style to complement your abilities - that's why I also took up Muay Thai.