No.....just because there is an "advisement" does not mean you are required to implement it.

If you visit the Official Wordpress site, you will find a full description of the features each release includes, and from that detailed information, you should be able to decide if the upgrades are critical enough for you to seek to evolve with.

New releases are distributed regularly, and for good reason: many of the 'bugs' are not identified nor addressed for some time afterward, and not until a stable edition is written are they re-distributed to licensed providers (like VodaHost) to include in their Fantastico! client modules.

If you really must have the newest edition prior to it being redistributed in Fantastico!, you can simply download and install it manually yourself according to the instructions available on the Official website!

>> To restore your Wordpress (and account) to what it was before it "messed up" simply follow the link I provided earlier to Submit a Ticket to VodaHost (your hosting provider -- the ones that has your site backups, right?)

Think. Plan. Implement.
Repeat.

Additional Wordpress Resources