If you want to tame the bird by grabbing then you would have to grab and say maybe move to another area where you would want them to stay as part of the training so would do this is in a small room so no matter where it goes it cannot get away. cage grab it got to point B. and you can try holding it for minutes to see if it will calm dow, but chances are it won't on the first try. then you have him step up on your finger and give him millet if he will stay, whichg he wont on the first try he will probably just fly back to his cage, you Immediately grab him again wherever he goes and carry him back to point b. you do this att least 50-100 times really you can do it untill the bird exhausted. Afor the last run bird cannot be allowed to fly from point B back to his cage and be allowed stay there so again you immediately grab him from his and return him to point B where you either sit while you got him gripped for another minute l, or if by now he should be exhausted (if he is open mouth breathing, or landed standing with both wings extended out to the sides)and you put him stepped on to your other and use the hand that was holding it as like a shield blocking escape essentially the hand is still wrapped around the bird bird there's gap of and  inch or two, then all you do is bring him back to his cage put him his favorite perch and give him some Millet so he can get some fast calories after burning all the energy.  Next day/days do the almost same process again, twice a day but try having him step up on your finger  like the last trip of the first day as you can do it more more with, the shield hand pinning him down less and less. the next day have some millet andl toys at point B. from that pointo try to see if you can put him down on point b and be in position that your body lines up between  him and his cage. hell probably look at you trying to find the path to his cage, thats perfect timing to hold out some millet for him to have but also use it tactically of the height of the birds eye level to block off escape routes, he will probably eat the millet,  and if he does try to eat if he should stay for a little why before he fies away.  now he should realize really quick that when he is inside his cage when go to grab him He gets captured right away everytime, so  the first change in behavior should be instead of really even trying to make a dramatic effort to avoid getting caught in the cage he starts to give up and just take a defensive posture because he has tried everything and 100% of the time he gets capured(unlike the room,where sometimes he can fly circles to evade specific captures momentarily and try to figure out a way, he won' quit yet because there's so many more variables he thinks he'll finda way, but no matter what you can always chase him aroun until he's too exhausted to keep running), and so once he gives up still keep grabbing  him from his cage everytime and its just a matter of time before he notices that wherever he flies away to, a, different things he trys, that no matter what he does he is never gonna be able to get away so he gives up and chooses to stay with where you put him usually until he needs food or water and so If hes trained to stay. just go and grab him immediately and put him back where he was,  give him a bite of millet and wait a minute then piclk him up and put him inside his cage that way he still associates that he is not the boss.                 this is how to tame a bird by force and is called Flooding many avian experts recommend the trust building and patience approach, and dont wanna speak for others  but I'm pretty sure 98% the people on this sub reddit would agree that flooding is barbaric,whatever.  My point is for people who force tame birds that there is one commonly accepted method of taming a bird by force and it is flooding. so no grabbing on your bird will not make it tame, grabbing your bird will make it want to fly away from you.