I think it's a common misconception... speaking personally, I'm oblivious and indifferent to whether I'm getting attention or not. I just have fewer inhibitions, it seems, than many people, and just like Mac always says, an ENTP is someone who SAYS, helplessly, all the crazy shit that INTP's THINK. So it tends to draw attention, but that's seldom the intention and I usually don't even notice if it has, I'm too absorbed in what I'm doing, thinking, trying to say, etc etc... if I actually do notice that I'm getting a lot of attention, the main effect is that I totally freeze and blush and start mumbling before quickly clamming up.
For instance, my parents came over the other day and my daughters were showing what they'd learned to play on the piano. I can play pretty well, but when they asked me to show what I could play I just refused, no way, can't get up in front of an audience at all. But if I'd just been practicing when they came in the door, I would've carried on playing simply because I was so absorbed in it that I didn't notice them there. As soon as I saw them, I'd come to a halt and freeze. And this is just my parents, in my own house.
I have tended to find that the people who have been the most determined to see me as an attention seeker, and to see it and much of my other behaviour and thoughts in a negative light, are INFJ's... I can't think of any other type that has so consistently thought they absolutely "had me down", whilst I've felt totally certain that they absolutely misunderstand just about every single thing about me. I've totally given up trying to explain to them as well, cos it only ever makes things worse.