Individual organisations / groups' practices vary
dramatically.
From a friend who was involved in health care analytics decades ago, they'd frequently find that specific norms of healthcare practice depended highly on senior medical personal (e.g., a head physician within a department), and that you'd find major differences in standards both at different-but-comparable groups and at the same group following a major personnel change (retirement, moving elsewhere).
Another friend doing roving-doctor work at a number of smaller clinics and facilities described wildly different standards amongst physicians specifically regarding antibiotic prescriptions (my friend resisted prescribing them without specific indication, other doctors offered them as a default).
As with many other aspects of the world, what we observe directly is very much through a drinking straw (if you can find one of those any more): it's a very narrow view. This doesn't mean your experience is invalid or even infrequent. It does mean that it's likely not especially generalisable.
That said, what seems to change overall behaviours most is standards and norms being applied through policy, whether institutional (think Kaiser in California) or at the governmental level (government-offered services, etc.). Thought comes to mind that much of the US is now experiencing the negative aspects of that last, as with many tools, it can cut both ways.