Bullshit, you can get a state ID card, works the same.
Not if you actually need to drive, unless you are reccomending driving without a DL?
A employee with a DL is more valuble to the company than one without, say a parts driver or delivery driver calls in sick, if you have a DL you can cover for him. Your boss really needs somehting picked up ASAP and cant wait for courier, if you have a DL you can go get it, if not you are screwed. there are plenty of situations where having a DL can come in very handy.
If you are an employer you are going to give more priority to hiring people with DL's if your company has departments that require driving, even if the posistion you are being hired for is not a depertment that needs a DL you will still give priority to DL holding candidates because of the flexability it will offer.
I have been a warehouse manager in the past and we rarely did our own deliveries but did have a company van to use in the few instances when we needed it(maybe 2-3 times a month) and 90% of the time i would drive it myself just to get out of the place for a while. But i still only hired employees with a DL just so i had the option of sending them for supplies or deliveries if i had to. That and people who go out and get DL's tend to be more responsable that people that do not IMO.