Being sexually compatible is very important in a marriage.
Just as I would not buy a pair of shoes before trying them on I surly would not consider exchanging vows with someone I never had sex with.
The leading cause for divorce is and always has been selecting the wrong the mate.
Most people enter into relationships/marriages impulsively or by happenstance.
The vast majority of couple’s therapy is teaching people how to fit square pegs into round holes or turn lemons into lemonade. In other words the therapist is trying to help teach them how to make the most of a "bad choice" in order to avoid becoming a divorce statistic. Most couples should have "premarital counseling" to uncover potential problems in advance.
A person has to know himself very well and know what they truly want and need in a partner. It takes more time to get to know someone than most people are willing to invest prior to getting married.