About ios 16.5.1 Update.

I would ask the same question in another way> What are the advantages of updating an iOS? Look here for an answer --> See what each update does: About iOS 16 Updates, About iOS 15 Updates, About iOS 14 Updates, About iOS 13 Updates, About iOS 12 Updates, and so on...

Nothing can go wrong if you had not Jailbroken your device.

While updating iOS is not mandatory, but updating your iOS software provides essential security patches, bug fixes, and enhancements that fortify your device's defenses against potential vulnerabilities. By staying up to date, you ensure that your device benefits from the latest security measures implemented by Apple, reducing the risk of unauthorized access, data breaches, and other malicious activities. Regularly updating your iOS not only enhances the overall security of your device but also helps maintain the privacy and integrity of your personal information. Therefore, while it may not be obligatory, updating iOS is strongly recommended to ensure optimal protection for your device and sensitive data.