Nothing does.
Which is why you need to punish them when you have the chance to, by anticipating their pokes and hopping over them (or sliding under them). Do this enough times, and they won’t poke as freely or as often, giving you more chances to get in close.
If you think you can simply outpoke Sagat, Cammy or Blanka with Maki, you’re not using her correctly. While she does have a pretty good set of pokes with forward kicks, they’re nowhere near as good as the ones you’re trying to beat. Stop trying to beat pokes with pokes and start beating their abuseable pokes by abusing the fact that they overabuse them.
I have absolutely no problem beating Sagat or Cammy using my “fighter theory” because I’m applying it. Let them poke at me all day if they want, because once I figure out when they’re going to poke, up and over I go, everytime. They stop after three or four times which frees me up to do the things Maki does best. I throw in hops and slides from time to time to remind them.
If this is your theory, you are definitely using Maki incorrectly. You need to do the “gimmicky ass shit” and use the mind game effectively in order for Maki to pay dividends against human opponents. There’s a reason she can do so much from her command runs. It’s to decieve people. You need to make them think twice about doing something to you, because if they guess wrong, they’re going to pay for it.
I fail to see why you think you must do a 720 often. I already explained what you should be using it for: After you’ve buttered people up to not attack you as often as they do. If you absolutely must land it, knock them down, then whiff close roundhouse/jump/cmdrun into 720 on wakeup. Very few people have the know-how to escape a wake-up throw super they don’t know is coming for sure (you could just backdash/jump again/regular attack, etc).
This being said, please explain to me why you’re complaining that you can’t land a 720 (when you need to be right next to the person) when you can’t land a linked kick super because you can’t get around their pokes. If you can’t beat their pokes with Maki, an unconventional character that uses unconventional fighting techniquies to win, then please consider using a different character.