Your link is for *current*, properly updated Linux Mint. It doesn't contain the hundreds of vulnerabilities that have been fixed in the interim. Subscribe to the security vulnerabilities lists and see how many there are. Your OS has no newer security fixes than like 2019 or whenever that was released.
Just because you've successfully played Russian Roulette doesn't mean you're gonna keep 'winning'.
It's your OS and your banking details, so do what you want. When, not if, your data gets compromised we'll be here to help you get it sorted on the tech end.
I'd trust cvedetails over the various Chicken Little sites:
How vulnerable is your operating system? We dug deep into a decade's worth of information and came up with this thorough study.
thebestvpn.com
....and I'm not seeing much to fret over:
Linuxmint Linux Mint security vulnerabilities, exploits, metasploit modules, vulnerability statistics and list of versions
www.cvedetails.com
Security vulnerabilities related to Linuxmint : List of vulnerabilities related to any product of this vendor. Cvss scores, vulnerability details and links to full CVE details and references
www.cvedetails.com
List of all versions of Linuxmint Linux Mint Detailed list of all versions with known security vulnerabilities of product. You can easily find the exact version you are looking for.
www.cvedetails.com
...but if you have a better cvedetails link, I'll gladly look it over.
Linux Mint forum put it best:
Playing Russian Roulette for 5000 hours with zero blood splatter? Now that has gotta be a worlds record...somebody call Guinness! If an outdated Linux distro (in LiveCD mode no less) can't match an installed EOL/EOS M$ rendition (with outdated browsers) for safety, then I don't know what to tell ya.
"we'll be here to help you get it sorted on the tech end."
Maybe you might want to try that on the title of this post 'Freeze-ups while using Linux Mint in LiveCD mode', before making bigger promises. Best to slay the baby dragon before challenging the real deal. Baby steps.
When actual reality starts supporting the chatter, when I have to call in my computer tech for a housecall, or call a taxi to cart my PC down to the computer shop, then my opinion will be revised. Until then I will view the EOL/EOS suppositions as a molehill overinflated into a mountain...a common practice since Y2K, becoming ever more common in recent years.