I’ve answered the question several times already, I don’t know how many more you’d like me to repeat it: I don’t think it’s beneficial for democracy or society for a politician to hold indefinite power. To expand upon that:

I think it creates political machines and hinders the ability for fresh legislative ideas or meritocracy in legislatures/political bodies because seniority is given preference, no matter how good of a lawmaker one actually is. Incumbencies of a long duration can also create unfair advantages because the name recognition and familiarity can set up steep burdens for new candidates.

By your logic, a monopoly is okay and good because consumers chose it and we shouldn’t remove that “choice” from consumers. But that’s not always true. Sometimes we do need to ensure one entity (person or company) does not obtain too much power or presence over society or a legislature or a field of enterprise.

To further poke holes in your logic, why have age limits or residency requirements or ANY requirements for politicians since it removes people’s “choice”? I don’t buy the argument at all that setting basic standards and ethics for politicians is robbing voters of their choice.