Its not. I will talk about Bangalore as thats what I have idea of.I have heard similar from my friends in other metro cities as well. 15-20k is now sort of new normal for PG . Even then, if location is close to techparks, it becomes shared room in same cost.
One of the biggest issue is, if in close by techparks, let say some companies pay high and some pay low, as per demand surge(post covid), prices are solely decided by ability to pay. Hence, if you are being paid good, you might afford living nearby, else you'll need to go farther and farther.
And public transport is again public transport. Considering the population we have, no amount of public transport is sufficient enough.
Also, as rentals are higher, everything else becomes costly as every industry(folks working in it) bears brunt of increased rentals and they increase prices to adjust spiralling cost throughout
You may survive at 5L but it wont be "pretty decent".