No, that isn’t the case at all. The issues with Starliner do not affect its ability to return to earth or function as an “escape pod” if that were necessary. There’s no safety issue or concern at all with using Starliner as a return craft. The issues with Starliner, as has been mentioned many times over the last few weeks, are to do with other parts of Starliner that don’t affect its return (it’s literally the thrusters that aren’t even part of Starliner that _will_ return).