https://www.merriam-webster.com/dictionary/insecure definition 3, https://dictionary.cambridge.org/dictionary/english/insecure definition 2, https://www.collinsdictionary.com/dictionary/english/insecur... definition 2, https://www.oxfordlearnersdictionaries.com/definition/englis... definition 2
Dictionaries have also by and large given up on prescriptivism. The correct use of language is the way language is being used, with dictionaries trailing and recording consensus reality, not defining it.