The question was about input rules, i.e. if someone would want to access something on AP (WinBox, ...). And as was already said, it depends. If you think that the network is completely safe, you can probably live without it. Or you can just limit access in "/ip services". But if you add real firewall and only allow seleted port(s), it can't hurt.
People who quote full posts should be spanked with ethernet cable. Some exceptions for multi-topic threads may apply.