It has nothing to do with experience, qualification etc etc. A dive guide will be allocated with you/group regardless of who you are!!
And as I said previously I think it often has little to do with providing quality diving and safety, and more on employment for the locals who have no other forms of employment. We are seen as the gringos with all the money, rich people (in their terms) and thus fair game to pay extra in some way.
Whilst at Truk we did a number of tech dives into wrecks. The dive guide went down with us but often did not stay the full dive (given his air stocks and the depth and time). We were happy with what he provided and understand the local requirements and in the end was a win/win for both the locals and us. We got to dive all the wrecks we wished, and he still got paid and no on was put at risk.
This is however significantly different to being forced to do a shallow crap dive, proving all the skills an OW student would get asked to do.
When I was in Bruni on a tech trip we were taken to a 14m "oil rig" read a few big pipes in the water. Second dive was a 4m mud reef. After that dive I had a pointed discussion with the LDS owner, explaining we come over on the basis of tech diving trip which was discussed previously at a seminar in Australia run by them to get clients. At that time they stated they had some 15 tech wrecks to dive. In getting there we found they had about 5 wrecks they could access and even then the Malaysian police were cruising looking to extort money from divers. Their way of dealing with that was to provide 4m mud dives given we had paid for a number of dives.
The discussion ended with me stating either put up or we would leave. We got more wreck dives but not the number or variety we were promised, thus we probably wouldn't go back. Never mind the fact that the dive boats always broke down every trip.
Dont mind giving some money to support the local population, in particular when there is little else for them. However dislike intensely being ripped by a LDS for their profit, or because they are just anal.