Don't give up your other styles.
I've also been told the same nonsense. It seems that the Argentine Tango crowd really have a bad attitude problem when it comes to dance no matter where in the world one goes. I'd been dancing ballroom, salsa and other styles for quite a while and decided to take a few A-Tango lessons. I must say I was disappointed with the condescending and disparaging attitude of the instructor. She was clueless about ballroom but kept on making these rediculous comparisons between the two styles when she learn't that I also danced ballroom. She seemed more irritated and annoyed than pleased with the speed at which I learnt the dance (technique, music, style, philosophy, etc). I have years and years of partner dance experience in different styles so A-Tango felt quite 'natural', easy in fact, yet she seemed determined to convince me of the superiority and the difficulty of A-Tango over all other partner dance styles; as if I needed to purge myself of all past sins and be reborn again. It reminded be of some religions.
The more styles one learns the more one realizes that all dancing comes from the same place. But one needs to experience all these different things to realize that they are all from the same place inside you. I find that each style can enhance and enrich the other. With each style you will discover another part of yourself and another form of expression. Figuratively and literally, it will become effortless to switch from a big ballroom top to an intimate A-Tango embrace at the drop of a hat.
Rha