Some research later, I found that it possibly interacts with certain bacteria that cause stomach ulcers and that these bacteria are more likely to be in poorly stored food. So, street food basically. This is a risk factor that would be much lower back home in Europe.
I wasn't able to get a definitive answer on this, but it's the best one I found so far as to why Aspirin is common in Europe and almost totally absent in Asia.
I take a pill of ibuprofen every once in a while when I have a bad headache, and paracetamol-based drugs only as a last resort when I have a bad cold or similar.
E.g. Panadol Extra is the same thing.
Non-Steroidal Anti-Inflammatory Drugs (NSAID) : https://en.wikipedia.org/wiki/NSAIDs
'NSAIDs and Gastrointestinal (GI) Injury'
<https://scholar.google.com/scholar?&q='NSAIDs and Gastrointe...>Proton Pump Inhibitors (PPIs) : https://en.wikipedia.org/wiki/Proton-pump_inhibitor
List of Proton Pump Inhibitors - Uses, Side Effects : https://www.drugs.com/drug-class/proton-pump-inhibitors.html
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Acetaminophen : https://news.ycombinator.com/item?id=35310951
N-acetyl-para-aminophenol (APAP), Acetaminophen, Tylenol, Paracetamol, Panadol, others : https://en.wikipedia.org/wiki/Acetaminophen
'Acetaminophen and Alcohol Hepatotoxicity, Liver damage'
<https://scholar.google.com/scholar?&q='Acetaminophen and Alc...>----
'P450 Drug Interactions'
Cytochrome P450 : https://en.wikipedia.org/wiki/P450List of Cytochrome P450 Modulators : https://en.wikipedia.org/wiki/List_of_cytochrome_P450_modula...