Sales of boats and other bigger-ticket items continue at several times the revenue of pro sports. Video, audio and computing dwarf pro sports. Garden stores and nurseries contribute more to our economy than pro sports. The proverbial little old ladies who call into the talk shows to complain about stadium deals and say they just want to tend their roses need not feel marginal. Their dollars are just as big and don't require massive public subsidy.
Movies generate more revenue than pro sports admissions.
Non-sport live entertainment generates more than pro sports broadcasting. Americans spend about as much on social clubs as on the 4 major pro leagues combined. Participant amusements such as bowling as golf account for several times the revenues of pro sports. Americans may like to sit and watch the pros but not nearly as much as they like to get out and do it themselves. All in all, Americans spend only a tiny fraction of their leisure dollars on pro sports admissions.