2002 VW Jetta GLS

Dealer replaced timing belt before i purchased the car. After 17000 miles needed another one. Took to new garage and the mechanic said that the first machanic used too much RTV sealant and it blocked 3/4 of main oil passage and that is why it did not last. Before replacing 2nd one I had to get catalytic converter and new secondary air pump. Do you agree that the sealant can cause these problems?