I tried everything with Smaug (with lots of helpful suggestions from this site), but he really will refuse to eat any greens at all and now he is about 3 and only eats insects.
Personally if your lizard is happy and healthy I don't see the problem. Sure he might live one year less but if the rest of his years are great then I think that is more important. Like other people have said some humans are vegan/ vegetarian and some humans eat lots of meat but as omnivores it can be a very individual thing.
Just do the things you can like gut loading the insects as much as possible.
Personally if your lizard is happy and healthy I don't see the problem. Sure he might live one year less but if the rest of his years are great then I think that is more important. Like other people have said some humans are vegan/ vegetarian and some humans eat lots of meat but as omnivores it can be a very individual thing.
Just do the things you can like gut loading the insects as much as possible.