Unfortunately, real apps and native tech stacks can not only write data to your SSD, they can usually write data to the user directory however they want and they can read it as well!
Browsers are at least somewhat sandboxed
Browsers are at least somewhat sandboxed
Yes, if one is committed to the standard Linux desktop, then one must hope that any proprietary apps one might need will continue to be available through the browser, but I'm ready to let the standard Linux desktop go (not right now, but eventually).