There is 'apathy' which means that someone is really not very interested in the matter. This is 'cognitive' apathy. But there is also 'action apathy'. Here someone is really interested but can never get up enough energy to do anything about it. There is a closely related 'passivity.
Most people prefer to be passive receivers rather than active contributors.
Today's society is very much set up to encourage such passivity. You sit there and information comes easily to the screen in front of you. Then there is the 'hassle barrier'. This is very real and very important. If action involves any sort of difficulty then many people are not inclined to make the effort to overcome that difficulty.