Ignoring C++ makes your interviews much harder.
If you fail to study any C++ prior to interview, competing candidates will perform better and win that coveted quant role.
If you're a MFE student, PhD candidate or prospective quant, your peers are likely to gain the best jobs because they’re able to impress the interviewer with their extensive C++ knowledge, while you're finding it challenging.
Without the essential C++ knowledge, there's a strong chance you'll find interviews much harder and it will take a lot longer to find a quant job.