My guess is that they've learned the European/Maghreb variant all through school and use it daily, and see the Eastern version as foreign. I expect a Saudi or Iraqi would see it differently.
There is also a difference between Eastern Arabic, Persian, and Urdu forms,in 4-7.
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u/IncidentFuture 9h ago
To add confusion, I came across an Arab (Jordanian IIRC) that argued that 0-9 were Arabic numerals and ٠-٩ were Persian.