Having a front driveway actually makes it harder for others to park - for two reasons:

1. If there is a driveway, the space outside the house cannot be used for parking at any time. So when the person is away, at work, on holiday, etc, no-one can park there. So therefore it actually means less parking in the street.

2. Parking in the street fits more cars in than a driveway. For example, I do not have a driveway, and nor does my next door neighbour. Three cars can park in the road in front of our two houses (our house is wider than a car). If we both had driveways, that would only be parking for two cars. Therefore one less parking space in the road.