because they can
indoctrination of "be prepared to pay more for premium <product/service/good corporate governance/esg etc>"
Sad but true. Remember, SG is bizness friendly ok. So, just suck it up.
Having said that, I have a feeling that Eight will be offering 5G soon due to sporadic field reports of Eight users being able to connect to 5G probably due to Eight testing 5G, albeit at specific locations only and not for a very long time, it appears.
This means that Eight users will either get a premium 5G plan, perhaps with less data and minutes; or they may get 5G completely free. Fingers crossed for the latter! If the latter happens, you can bet even more people will port over to Eight! 5G at $8 OMG... FOMO!!!
A girl can dream.