It’s a common phrasing in English and has nothing to do with any ideology. Booster replaced “cheerleader” for this purpose some time in the mid 2000s.

See also “cryptocurrency booster” for another example.

I understand what it means. That’s not what I’m asking.

“AI booster” appears 100X more often than I ever saw “cryptocurrency booster” and the phrase is always associated with people who have a specific ideology about AI.