The problem in the title is not the word "deceivingly" but the word "are". It should say "appear" or "seem". The reason is the common understanding of the word

The problem in the title is not the word "deceivingly" but the word "are". It should say "appear" or "seem". The reason is the common understanding of the word "robust" to mean the strong end of the spectrum from weak to strong and not the entire spectrum itself. The only way for the title to work is if you use the other (wrong) meaning of "robust".