The same old argument.
They are meant to be broken, but they work better than straight lines on a logarithmic chart.
BTW, it seems that the line we are currently at happens to show more resistance than I assumed. I wouldn't be surprised if we crash to 15.... That said I don't even think that it has any predictive power whatsoever, it is just that people come to similar conclusions (or follow the blue guy). This group behaviour then actually makes those charts become true.
The simpler the pattern is the more likely it is to be followed since more people will recognize it and act accordingly.