First, this isn't true. The MLB operates like socialism for the owners. The value of the television contracts are overwhelmingly due to a very small number of franchises, but the revenue is split between all owners to subsidize markets with small fanbases. So you don't need to directly support a specific team for the owner of that team to get rich anyway. This is effectively why rich people bother to buy teams like the Marlins and Rays, gut the entire roster, get by paying the minimum payroll the league collective bargaining agreement allows playing to empty stadiums with no fans, and sell for a profit anyway.

Second, I haven't lived in Los Angeles for a long time and have never bothered to pay for any sort of subscription service that allows me to watch the games anyway because they tend to air well past my bedtime, so no, the value of MLB and LAD television contracts is not in any way directly contributed to by me personally.