Why are sea turtles a endangered species?

According to https://oliveridleyproject.org/ it says “Recent estimates show us that there are nearly 6.5 million sea turtles left in the wild with very different numbers for each species”. The sea turtles are threatened because there is a lot of trash in the ocean. It feels sad because sea turtles are dying in the ocean because of these threatening things. According to https://conserveturtles.org/ it says “If sea turtles went extinct, dune vegetation would lose a major source of nutrients and would not be as healthy and would not be strong enough to maintain the dunes. If a sea turtle was not in a good condition how would you feel?