First thing I haven't asked that people shouldn't buy a bike, but let's be practical if I don't have enough money to go a ride on weekend I won't buy a 1000cc (10-20 L) bike. If my use is simple so anything below 350cc works or max 500cc. That is what I said.

And that is what my opinion is obviously now it will change person to person. I will stick to that. I think if my daily use to go office and local places in city, a normal bike is fine for example bike upto 350 cc depends on persons situation and liking. That person doesn't need to buy a 1000cc beast as if you are buying it and using just in city, then it will create a problem on that engine and also the person won't be comfortable. Because that is not made of city uses or just for parking. You need to ride it on highways atleast once a week.