This worked in Libya against poorly trained personnel, poorly serviced and antiquated equipment. This is unlikely to work against a more competent enemy. First, what makes you sure a cruise missile will not be detected,engaged and destroyed by the SAM? What makes you think the radar will be up and transmitting and easy to find? What makes you think there is only one radar?
If the system is capable, the crew competent then you have to get real close and take a few chances to take out the SAM. This stand off engagement stuff with cruise missiles and glide bombs looks good in a marketing brochure in real life you have to work hard to kill a competent enemy.