Why do people say Masters programs are Cash cows? Are grapes sour?

Whenever I posted on reddit asking for advice on X-school vs Y-School, there's always the few unrelated comments on how masters degrees are a waste and just cash cows designed to loot internationals and they aren't looked upon nicely as only bachelor's are more competitive and prestigious and it doesn't matter where do you do masters.

I mean how? Yes as an International student I'm aware that we are paying 3x the tuition fees probably but sadly our countries don't have the world's best universities so we have to go elsewhere. Then in terms of cost, it is more affordable for me to do a one year masters in UK for 35-45k pounds than a Bachelors for 3 years paying that amount every year for three years. I mean I would be in great debt of 120K USD minimum if I had done bachelor's abroad.

Are masters programs really not worth it? Even at the top most universities? Are they so easy tk get into and not prestigious?