Control and responsibility.
WHAT IT GIVES YOU
The ability to install any software Change any configuration See everything on the server Do anything, including destroy it
WHAT IT REMOVES
Guard rails.
On shared hosting you cannot break the server. With root, you can.
WHAT PEOPLE USE IT FOR
Installing software not available on shared hosting Configuring services specifically Running non-standard applications Managing multiple sites at a level shared hosting does not permit
WHAT IT DOES NOT GIVE YOU
Competence.
Root access with no administration knowledge is a liability.
THE COMMON OUTCOME
A server that works initially, is never updated, and is compromised within a year.
WHAT ROOT REQUIRES OF YOU
Keeping the system patched Configuring a firewall Monitoring Backups Responding when something breaks
IF THAT LIST IS UNWELCOME
A managed option or shared hosting is the right answer.