In my opinion, you're right - people who think it's impractical either don't know it or don't do it right. I think people who say that either just see the roda, which isn't real combat, but at the same time, they teach fundamental principles of non-resistance and escaping attacks, as well as effective kicks, strikes and takedowns, but people only see the acrobatics and high "flashy" kicks, and make that judgement. I think any style can be practical if you know how to use it that way.