Plenty of people outside the US will have experience with pre-existing conditions as a factor in health insurance.
For example many Germans will have experience with it because they have a system that has both a public and a private system. Those with high enough income (around 70k Euros) can opt out of the public system and use the private system instead. Also there are some classes of people that only can get part of their coverage from the public system and so need to buy additional coverage through the private system.
Insurers in that private system can take into account pre-existing conditions. They cannot reject an application over pre-existing conditions but they can charge higher premiums because of those conditions.
Another example is Switzerland. They have a universal healthcare system based on mandatory insurance from private health insurance companies. For that mandatory insurance pre-existing conditions are not a factor, but there is also supplemental insurance available that covers things not included in the mandatory insurance.
The supplemental providers can and do consider pre-existing conditions when deciding whether or not to provide coverage.
For example many Germans will have experience with it because they have a system that has both a public and a private system. Those with high enough income (around 70k Euros) can opt out of the public system and use the private system instead. Also there are some classes of people that only can get part of their coverage from the public system and so need to buy additional coverage through the private system.
Insurers in that private system can take into account pre-existing conditions. They cannot reject an application over pre-existing conditions but they can charge higher premiums because of those conditions.
Another example is Switzerland. They have a universal healthcare system based on mandatory insurance from private health insurance companies. For that mandatory insurance pre-existing conditions are not a factor, but there is also supplemental insurance available that covers things not included in the mandatory insurance.
The supplemental providers can and do consider pre-existing conditions when deciding whether or not to provide coverage.