LGPL doesn't allow use in closed source projects, it allows use with them. So you can use LGPL dynamically linked library with a closed program (that's what LGP

LGPL doesn't allow use in closed source projects, it allows use with them. So you can use LGPL dynamically linked library with a closed program (that's what LGPL was made for), but you can't just embed LGPL library with no source and way to replace it like you can with more permissive licenses.