I study frame data because 1) I find it interesting and 2) It is instrumental to offline tournaments, which I do like to attend when I can.
I try to apply that knowledge to online casual matches because that is the type of play I find most fun and relaxing. Nothing is more infuriating than being beaten by some shit you don't understand (ie: try to punish an unsafe move and get hit out of it). When you understand frames, and they're working properly, things become more engaging. However, that can only happen on occasion during online play, because of lag/whatever.
That said, I do still try to play "honest" online. I don't mash out of disadvantage, as the game is more about yomi (mind games) than execution (to me). I like to trick my opponent by testing their knowledge of frame data. If I know things they do not, of course I'll abuse those things until they learn to fight against it.
The "try-hard" insult is hilarious because I have never been called a try-hard by an opponent that I actually try hard to defeat. It is always used by unimpressive idiots who try to justify their loss by implying "I have a life, and that means I'm too cool to learn this game as well as you have. So really, you're the loser here." And what kind of fucked-up logic is that? Really? Putting aside the ever-prominent subjectivity argument and how pitifully sad their evaluation of what a life may be to another, maybe the "try-hards" do live a life that the accuser would consider as fruitful as their own, and that they just also happen to be good/decent at the game? Obviously the fact they they play the game can't mean they have no life, as the accuser plays it also. Maybe they aren't trying hard at all? Maybe you can study the game and have a life!
When I get called a "try-hard," I have (ironically) never tried hard at all. I can abuse one or two set-ups, spam Izuna loops, etc. and that's not hard. That's as easy as it gets. I don't even have to study frames or "try-hard" to win flawlessly with an opponent of such low skill. It just comes naturally.
So if you're one of those butt-munches who is part of or defends the "try-hard" brigade, just know that when you call your opponent a try-hard, you are both 1) wrong, & 2) giving your opponent the ultimate satisfaction of laughing their ass off by virtue of the fact that they made you salty without even trying at-all.
/endrant