Yes, if external actors rather than the self-organizing teams own the process, that is probably the first response, but that won't actually stop the buildup of tech debt and the velocity impacts, though it may produce a one-time, non-repeatable improvement, so even in that case if someone (even the wrong actor) is monitoring velocity and doing process improvement, there will be an impetus for further change.

(Of course, if the wrong actor is monitoring velocity and controlling process, then the team has an incentive to mask the effect of tech debt but continuously adjusting estimates to maintain the illusion of constant velocity, a d avoid the first bad response, or, if that opportunity is missed, to avoid the subsequent external interventions.