That's not generally correct. Compile-time is a concern for several databases.

Most systems submit many of the same queries over and over again.

Ad-hoc one off queries usually can accept higher initial up-front compile cost because the main results usually take much longer anyway, vs worrying about an extra 100ms of compile.

Maybe it was too strong to say its not a concern at all, but nothing like PG where every single request needs to replan and potentially jit unless the client manually prepares and keeps the connection open.