the way immigration works in this country it’s not like the entire world can just up and move here and become physicians. You’re fine.
People have been saying the sky is falling in medicine for longer than I’ve been alive and the sky hasn’t fallen yet.
Now, if you’re just in it for the money, it’s not worth it. Medicine isn’t the guaranteed path to absurd wealth that it once was (save for certain sub specialties). But even if you go into pediatrics you’ll be compensated very, very well and have no issue getting a job.