I disagree with the highlighted. A 443 maybe scored 3-5% less overall than average. And while it may be 1 SD below average its not that significant of a difference. Now compared to someone who scores 600+, sure, I would expect a significant difference there in knowledge. As far as passing future boards, especially as most students improve on their level 2 due to its clinical base, I would expect OP to do better and don't see a reason to be concerned about them passing.
Otherwise I agree with the comment and that IM is generally open with community programs.