But if it's not plus on block... it's not a *frame* trap. It's a "I'm going to make your active frames whiff and hit you during your recovery frames" trap. Its still a "trap" but I just wouldn't call it the same as a *frame* trap.
I mean, that would make jumping out of tick throws "frame traps" because you're making the active frames of the command grab whiff and then punishing with a jump in during its recovery frames. They're two different things, being plus on block and doing your fastest poke to create a gap too small to possibly poke out of, and making a gap big enough to get a move out, but making it whiff and punishing it during the recovery frames.
Also, if Lao does 11212 and tries to do instant divekick, plenty of normals and specials will beat out the divekick. I mean in a mirror match lao himself can just raw spin and beat the divekick in this "frametrap", where if he tried to raw spin out of an *actual* frame trap, the aggresor's poke would stop the spin.
Did you really just suggest to spin on a jumping back lao on a -3 move thinking dive kick its his the best bet?
take as you will, frame traps don't need to be plus, the concept of frame trap is, "if you press a button on a wrong instance you think you could take the advantage of, the opponent as equal chance to punish your crush attempt with a counter" afaik that is a frame trap.
Kabal NDC pressure in MK9 was a set of frame traps, where his F3~NDC or B1~NDC where all +1 but doing sequential he had an actual gap of 12 frames, so you could still hit kabal out with a 10f jab into a combo starter even with F32~NDC which was +2 and leaved an 11f gap.
But when he did a d3 out of the NDC and you blocked it, he was at -7, but trying to hit him with anything after than you probably get you killed, because he had a 9f mid to mask that number, a flash parry out of NDC to counter your own armor atempt, this is where the frame trap was.
Take Jin in Tekken for example:
F4~F was recently made +2 on block, but even when it was -2 he could still crush highs by doing 1+2 after doing F4~f on block to beat ppl trying to answer to him with a high, so Namco not only buffed F4~F to be +2 on block, but they made his F4 -5 on block and gave him a launching EWHF
Now Jin can poke all day with F4 without going into stance to ppl can press buttons thinking he is going into stance and punish it, and when he goes he has less chances of missing because he has a high crushing move, a parry that avoid immediate mids after canceling, and he is still at -1 when he cancels the stance after F4.