That's a myth, Bumrungrad isn't cheap but that have single pricing, unlike government hospitals.
I am getting top of the range Swiss made hardware, and needed bone graft and sinus lift. Go to Smile dental for the same set you'll end up 10-15% cheaper, maybe. Also I chose Bumrungrad as I have been using them for 10 years and for my first implant I wanted a trustworthy provider.
I also getting a 75% refund from my insurance. I wouldn't be here otherwise.