In principle, yes. Only the much lower mortality risk does not necessarily have something to do with meat consumption. On the contrary, occasional meat consumers (moderate vegetarians) are even healthier.
Among the results mentioned comes the German Cancer Research Center based on a study since 1979 with 1900 vegetarians. In figures: According to statistics, the 100 expected deaths in the age group of the study participants compared to only 59 actual among the vegetarians. By comparison, occasional meat eaters outnumber vegans and ovo-lacto-vegetarians, so factors other than meat consumption must be critical.
In addition to the diet, the study also covers other lifestyle factors such as smoking or physical activity: As expected, smoking increases the mortality risk by an average of 70 percent. On the other hand, participants who rate their physical activity as medium or high can look forward to: their mortality risk is reduced by one-third compared to mourning.
So, it seems that vegetarians do not live longer because they do not eat meat, but because they maintain a healthier lifestyle overall.