Tire Pressure Light On problems of the 2007 Toyota Camry

I took my 2007 Camry for 25,000 (at 23,000) miles service. I was told that I needed new tires. I questioned it and was told “you have to take some responsibility, too� I take my car in consistently do pretty much what is suggested to me as part of preventive care and I have all the bills to prove it, mentioned this to the service person, and talked to manager and was told that yes I needed the new tires. This was "norma"l wear and tear. I sure was not ready for such a large expense. As I was researching for what kind of tires to buy, I found that many 2007 Camry owners have had the same problem! also I found that there is a leakage problem with the bridgestone tires, and checking my service bills, I see that I had taken my car in to have the pressure lights checked, because I would add air to my tires and few weeks after I would have the light come on again. All this is documented and now I am furious that I was not told of this problem. Thankfully, I am not on the highway driving ant 55+ miles an hour, as I work near my home. I hate to think of the outcome. When I have taken my son back to school, is when the pressure light would come on most often. Now it all makes sense! since I took the car in, the pressure lights have not come on, I now wonder if that option has been disabled? obviously, I have not yet changed the tires, as it is very expensive to buy all four at the same time. I was hopping the dealer would give me a break.