There is more out there for a short model, but she has to be willing to chase it, find her opportunities and really strive. There is only so long a glamour model can book work. The better route is through commercial print modeling which is based around modeling for ads and commercials. These models are not all tall but they do have to have good photos and know how to market themselves to the proper agencies.
If at the end of the day men are the only ones thinking you are a model, then you should question whether you are really a model?