Yes, they needed to come off. If he did it, great! That's MINIMAL.
Now what is needed is thinning and cut back.
Look carefully at a branch where current year growth is happening. You will see where the bloom was. And where the ovary was removed. At the base. Now, there's most likely 3 new shoots with light green leaves. Behind that is last year's old dark green leaves. Right? There would be a circle of sorts right there. Of old leaves. Remove the old leaves. You can pull them off by hand if they come off easily, or you can cut them off with sharp scissors.
Now, look at the 3 shoots. Maybe there's 4. You only want to keep 2. If one is growing down, remove it. Leaving the two side shoots. If one is growing up, remove it, leaving two side shoots.
Now, look at the two remaining side shoots. You will see that leaves occur in pairs or triplets. Any leaf on the underneath side gets removed.
Now, you see that there will be a place where there are two leaves coming off the new stem, where the leaves are side by side. There may be two or three inches of new stem growing out beyond that. No matter, cut back to those two leaves!
I know, you're going to remove more than you keep! And !gasp!, you are cutting off flower buds! Oh! The horror! Be not afraid!!! You will get two new shoots, each with a flower bud from the base of the two leaves you keep!!
You see, doing this will stimulate the tree to make MORE SHOOTS! More shoots means MORE FLOWERS! Isn't that what you want???
If you don't do this, now, you won't get twice as many flowers. You won't get twice as many small branches! Instead, you'll get long, leggy branches! The shape of the bonsai will decline.
Oh sure, you could start it completely over next year when you see I'm right. But it will cost a couple years.
Anyway, fo what I just described all over the tree. Yes, it will look like a plucked chicken. For about 2 weeks. And then, it will reward you with twice the growth! Twice the density! Twice the beauty!
Kinda like like how Jesus fed the 5000 with a basket of loaves and fishes.
You just have to have faith.