Remote code execution by prompt injection is not only about privacy.
Having a stranger’s script happily running on your machine is also quite a huge security concern especially if all of your stuff is not on-runtime encrypted with passwords/documents/crypto/etc. 
I was absent for sometime and it seems that forum becomes more vibrant.
Another option can be buying a Google workspace subscription which includes Gemini. Workspace subscriptions are covered by business protections. All Google workspace, eg business standard license is cheaper than ChatGPT subscription. You need to know about being an admin in Google console and some downsides of this.
unless you buy Claude which usage rates are far more on the lower side than others, I would not expect anything good even for paid subscriptions including ChatGPT. Ads are coming maybe even for paid subscribers.