It needs to be YOUR CHOICE to clip your bird's wings, not anyone else...
My advice is that if you are sure you'll make a concerted-effort to train your bird every single day while his wings are clipped, and if you're only going to clip them once, so it's a temporary thing that will last for only, at the most, about 2 months, then it causes your bird no harm at all, and it does help in training them.
***It's important to know what to say to the person who clips your bird's wings, so that his wings will not only grow back completely in 2 months or less, but also so that your bird will still have enough wing-feathers to be able to glide to the ground in a controlled-fall, and not drop like a stone.
Make sure you tell whoever clips your bird's wings that you only want the outermost 4-5 Primary Flight Feathers clipped on each wing, and that's it! You don't want anymore than that cut. This will ensure he can safely glide to the floor, and that they will grow back in a month and a half to two months time.
****It's also important to know that clipping your bird's wings is not only completely temporary, but it also is completely painless. It causes no "harm" or "pain" to your bird, despite what people might say.
This is an individual choice that you and your family need to make. Some people opt to never clip their bird's wings, some people have no choice but to keep their bird's wings clipped all the time due to safety reasons, or due to a disability they might have that inhibits them from being able to get their birds to come back to them or their cage. Some people should never clip their bird's wings because they have another pet in the house that is a predator to their bird, such as a cat or a dog, and their bird needs to be able to get away from them. So the important thing is that you need to make the decision with your family, but also that you're do what's right for your bird at the same time. There are other options, such as Target Training, which usually also works well. It's all about what is right for you.