Engine Head Gasket Failure problems of the 2011 Lexus RX

My 2011 Lexus Rx 350 has a front timing cover leak. To fix the front timing cover leak, the dealership has an estimated price of $4,000. 00. In order to replace a gasket on the timing cover, many accessories and parts needs to be removed. I think it is a safety issue if the engine is losing oil and it stops running. I also believe that it is a poor engineering design, or a manufacturer error. In order to replace a simple gasket, it requires monumental effort and expense. There are many other gaskets in the car engine that are easily accessible and lasts much longer.