(although he rarely accepts such requests nowadays).
This is the same as saying that the admin does not consider such applications at all.
It turns out that "The Pharmacist" has a privelege for it? The admin chose him specifically and chose his application specifically.
And what about the rest of the people? Are they shit for the admin or something?
Why don't you try that yourself then? Not only The Pharmacist but many users got their usernames changed. Not only that some OG member got custom titles (Those who passed away, left the forum or those who had a huge contribution to this forum).
If you need it so badly then ask theymos in PM or register another account. If you have a valid reasons for requesting username to be changed, he might consider.