The fact that you're willing to put in the effort for accents with different words, contractions and pronunciations but
not willing to put in the effort for slightly different stress/melody is sadly quite common.
Someone saying "I'm going to pick up my ute in the arvo while I eat a jaffle" - sure, let me look up what that means. Whereas "Kindly do the needful" - no fuck this, you need to learn to fucking speak English.
I'd say the difference isn't what you've pointed out, it's the colour of the skin of the speaker. White people saying anything they feel like - the onus is on the listener to adapt. Brown/black people saying anything - they need to learn to speak English.
> lumping "Scottish" together is already weird
You lumping "Indian" together is equally weird. What's the matter? You can't tell the difference between a Tamil person and Malayali person speaking English? Spare me the condescension, please.