He’ll never be “locked in”. He can always change his career path. This generation is told to expect to change career paths during their lives - perhaps more than once.
As suggested, the RN to BSN is a great credential. Nurses have many career paths outside of direct patient care. Insurance companies hire nurse in a variety of capacities. Pharmaceutical companies do the same. Nurses can advance into management positions both in hospitals and elsewhere. Any of those options and more may require an advanced degree or other credential, but that is true in any field.