UAE banks are safe(high CET1 ratios, high credit ratings etc...) still it doesn't make sense to keep a high(7 figures) amount in UAE banks because of the service standards. Every bank in UAE has a "Wealth Management" or "Private Bank" segment but their service standard is low, I mean very low.
If you open a private bank account in Switzerland they will assign you 10 years of wealth management experienced relationship manager who knows investing better and understand your needs + exclusive bank services. If you open a private bank account in UAE you will deal with amateur relationship managers(2-year retail banking experienced "Wealth Specialist")︀ and low service standards.