Lenny,
Track & Field was a major (your word) sport. All sports are major to those that are involved. Perhaps you mean that Track & Field can again become a visible sport.
When I was starting as an assistant with a small D1 program in the 1980s, a well established coach confided in me similar sentiments. He was staff/ event coach of an Olympic team, well published, was HC at at least three universities one of which is now in the SEC, and then towards the end of his career, an AD. He had lived through the changes of Track & Field brought about by Title IX. The position he took was that the addition of women’s track doubled the amount of time required to host a meet and detrimental to the sport. Because he was a product of the southwest, lived many years in the Deep South during the social revolutions of the 1960s, and some of his writings refer to “the trackman,” he probably held a bias against women. The root of the problem you perceive may be found in his belief that a meet is just simply too long for spectators. Has the NCAA not solved this issue at its indoor and outdoor championships by hosting women’s and men’s events on alternating days? Will (girls) women only meets at the middle school level be effective to grow interest? On the other end of the spectrum, does the Olympic Games have problems with women and men competing on the same days?
Attendance records of meets held prior to the mid-70s do show big numbers of fans at relays and invitationals all over the country. Also during that time Track & Field was rarely seen on television. There are many reasons for the decline of interest in our beloved sport in ranking order of public perception. Other sports and organizations like NFL and NCAA football took a lead to increase TV coverage for their games. Until just a few decades ago not every game was broadcast, and now streamed. Out of market games for MLB and NBA are easily watched. Even auto racing saw the way to gain fans was to get TV exposure. Sadly Track & Field, Cross-Country, and Road Racing is hidden behind costly contracts and not accessible through an easily recognizable streaming provider. ESPN led the networks to air more diverse sports. More sports were developed or made more readily available- triathlon did not exist until the late 1970s, soccer grew a grassroots program, lacrosse now has a similar trend, as does rugby. Cable networks now offer viewers with hundreds of (oft repeated) shows on a variety of topics. With the first running boom sparked by Shorter’s Olympic win, folks moved to the roads as participants, not just spectators.
Stating that including women’s events within Track & Field as the sole cause of dwindling interest does not seem accurate. The lack of vision by leadership groups to market the sport beginning in the 1970s does.