they increase the power of organized factions that are not directly accountable and which provide support for politicians between offices
That's one factor, sure, but you have to consider that tenured politicians are both a force in their political seat as well as a force in the "organized factions", so they magnify the power of those factions and reduce the need for those factions to expend effort. Once a faction owns a candidate, the candidate helps them maintain power so the faction can gather more candidates with less marginal cost.
At least with term limits, there are chances for citizen legislators to attain office. Organized factions have to expend much more effort to keep their candidates elected and in check.
Besides, term limits are just one problem. Dealing with the organized factions is another one.
That's one factor, sure, but you have to consider that tenured politicians are both a force in their political seat as well as a force in the "organized factions", so they magnify the power of those factions and reduce the need for those factions to expend effort. Once a faction owns a candidate, the candidate helps them maintain power so the faction can gather more candidates with less marginal cost.
At least with term limits, there are chances for citizen legislators to attain office. Organized factions have to expend much more effort to keep their candidates elected and in check.
Besides, term limits are just one problem. Dealing with the organized factions is another one.