Tyres in my car are okay

I don"t like listening to advices from people who don"t know anything about the business themselves, you know what I mean? if I don"t know how to deal with certain aspects of my own branch, how can I give advices and promise anything to somebody else, huh? This is beyond my understanding but still, a lot of people do that. they just don"t think about certain issues in advance you know what I mean? Car parts are my branch and I happen to know quite a lot about this aspect. You may like it or not, but I will never let anybody deceive me when it comes to this subject. tyres in my care are still okay so when somebody wants to come and try to tell me something I know is wrong, convince me to something that I don"t want to be convinced to I just always know how to behave. I never listen to such people. Last week there was an expert that gave me advices about my car tyres. he claimed that they cannot be used anymore, that they are already too old and it is dangerous to drive such a car. but I know what tyres I bought. They were really expensive so I believe in them, you know what I mean? I don"t like situations in which there is a stupid guy made out of me, you know what I have in mind, don"t you? I believe I have expressed myself well enough to make you see my point, is that right?