The many, many, many, many DJ's now out of work due to the ability to voice track would strongly disagree with you.
It's a dog eat dog world. Those who are working see it differently. It's a competition, not an entitlement.
As someone who works in radio, I will tell you there are more jobs now than there were before doing more interesting work than sitting at a console waiting for a song to end. The job of being a disc jockey really ended when there weren't any discs to jockey anymore.
Unless you meant to say big corp. radio ownership likes it because they can pay someone for an hour or 2 of work what they used to pay someone for four or five.
So you would be willing to give up your washing machine and wash clothes by hand? Give up microwaves to cook food on a stove? How many modern conveniences would you be willing to give up?
Radio stations used to hire live bands to play music rather than play records. But it's cheaper to play records.
Look around. Bank tellers replaced by ATMs. Grocery clerks replaced by self-checkout. Newspaper delivery replaced by the internet. We call it progress. Things are not like they used to be. If they were, you wouldn't be on this message board.
If doing a live radio show 5-6 days a week for 4-5 hours a day is taking away from time with the family you're in the wrong business.
I started in radio working overnights. I hated it. I quit and never had to do it again. I'm in the right business. Computers make it possible for me to live a normal life.