Hornworms are a delicious treat for any lizard large enough to eat them. Bearded dragons seem to love them. If you catch them and put them into a container with a food/water source anyone with a pet like that will happily pay you for them.
Sure, wax worms and hornworms have a higher fat:protein content than is “healthy” for your captive lizard. A treat is exactly that, you should not feed them only snacks everyday just like your dogs or cats or yourself!