Sharona....
I don't quite get what your vet is saying...her is what my vet said:
Laser surgery makes surgery easier for the doctors and the dog. For the doctor it is more precise. Because it coterizes (spelling) as they cut, it REDUCES healing time for the dog.
Lucy had internal stitches, personally I think this may be more a prefrence of the vet than dependent upon the type of surgery. Also, it may be different between males and females.... I know with Lucy they said that they had to place something under the skin behind the stitches and that many dogs have a slight reaction to that which causes the need for antibiotics. The vet said it is just impossible to tell which dogs will react and which wont, so he always uses it. Lucy showed some signs of reaction, but she was already on antibiotics for something else, so it wasn't a concern.
If you aren't satisfied with your vet you should definately change. This vet clinic that I'm going to now I really like - all the people are great and they are really fair on payments - I've had two follow-up appointments that they didn't charge me for (I was only there for half a second...

).