It is worth doing also because years ahead when both of you are working and you have three kids, a dog and a mortgage it is the deep non-physical intimate connections which carry you through.
Even in the first year, it is the friendship you developed that will get you through the difficult adjustments of living together. When sex is a part of the dating, deep flaws and incompatibilities within the relationship are also masked or papered over or rationalized away, because the sex feels good and makes you feel good about the other person. A person is in love with being "in luv," rather than taking a hard look at the one with whom he/she is planning to commit to a permanent, exclusive, forsaking-all-others, relationship.
When the sex with that person loses its mojo, there is no rock on which the relationship/marriage should have been built on which to stand, and so the marriage breaks apart, especially if there is also no practiced faith that holds the couple's feet to the fire.
Thankfully, marriages can hold together when sex was a big part of the relationship prior to the exchange of vows, but such marriages start off with greater risk of divorce, or often spouses endure marriages with incompatible others for the sake of the marriage (or the children), and neither spouse is happy.