Hollywood isn't particularly liberal on the business side. It's a straight up business. No different than any other business.
Business decision makers tend to be rather conservative, at least while they're on the clock, because all money discussions involve their money and a good business decision maker wants as little of that to be outbound as possible.
"Why is Hollywood so hell bent on forcing sex and profanity on our kids. Bunch of perverts."
"They are not doing it for the money. Almost everything Hollywood puts out is put out to influence and change minds, and making money is a secondary reason."
Hollywood could sell more DVDs if it made sanitized versions, but it refuses to do so based on principal (that no one dare change their art).
I don't see any PG versions of R rated movies. They could easily do this and make a ton of money, but it shows that the business reasons are outweighed by other reasons. Hollywood does not make movies just for profit--they do it for other reasons as well. In other words, the profit motive is not there primary concern.
It's amazing to me how many people don't believe that Hollywood is in it for the money.