Sure you can eat without your molars. you can even eat without teeth but why would you want to? At 53 you are young and I would hope you have many quality years of life ahead of you. The quality of those years will certainly be impacted by how healthy your teeth are.
It may not seem like a big deal to some, losing a tooth here or there. Especially in areas that are not that visible when smiling. But there are many negative consequences to losing teeth and the loss of molars can have a big impact on you. Remember when you lose teeth , you also lose the bone that supported those teeth. That means the bone shrinks away and support for the teeth on either side of the lost tooth decreases. In some cases this will cause the surrounding teeth to tip into the toothless area. It will also affect your appearance with aging. Many people suffer from a "sunken-in, aged Look" in the cheek area when they have missing molars in the upper jaw.
Other complications can arise from the loss of the chewing surface area, much of which is provided by the molars for crushing and chewing food. This activity, known as mastication, not only helps you digest food, it allows you to taste your food better. Having molars allows you to enjoy a well rounded diet, which obviously has direct consequences on your overall health.
So, can you live without Molars and still eat? Yes, many do but ask most of those people missing their teeth if they would enjoy life more with their teeth back and most will tell you they would.
We are at an incredible time in dentistry. We can replace missing teeth, in some cases immediately, with implants that function just like your real teeth. Bridges are also a good option when a single tooth is missing and can again provide you with a well balanced biting surface for eating. With options like that available today why would you not want your tooth back?