IMHO Traffic is the most durable finish available. Also the most expensive.
It is also compatible with other finishes. Once the Glitsa has cured Traffic could be applied as a protective top coat. If your concern is the lessdurable finish on the floor, and the appearance is acceptable. Add a protective topcoat.
It sounds to me like this contractor is not familiar with waterborne finishes. If you are not familiar with the differences in application methods you might end up with unsatisfactory results.
For which a great excuse is that there is a problem with the product.