I agree with you and I am very much disappointed with the youth nowadays. So many of them are running away from sikhi and I have seen some youths take amrit but don't keep a proper rehit. I really look up upon the youths around my age that have been blessed with amrit but it's really disappointing when I see all the truth.
that is strange, because these can be pronounced lightly without changing the meanings. let me see if I can find a video where this is pronounced.
like some paat I listen to when the paati is saying:
ੴ ਸਤਿ ਗੁਰ ਪ੍ਰਸਾਦਿEK ONG KAR SAT GUR PRASAD
they are saying prasad(i), like pronouncing the sihari.
The sihari is quite light compared to bihari, so not everyone will notice.
Because, remember, the way we speak punjabi is different from British English. Like for standard english you try and say the words as-is. But in punjabi we have accents, and the sihari and aunkar for words also kind of adds an accent.
Like if someone has the name Deepinder or Bhupinder, some people especially outside punjab may right their names as Deepindra or Bhupindra. And I don't think this is as strong as using a kanna, it's just a little bit of desi accent in the end!