You frame as if agency exists, then exploitive coercion doesn't exist.
We can respect the agency of folks to smoke or drink, while also criminalizing lying to entire populations about the known health effects of your products.
We can respect people as having agency, while also acknowledging that psy-ops like those run by Cambridge Analytica, or even normal psy-ops like mass market advertising, can influence groups of people through deceptive or manipulative ways in aggregate and cause massive harms.
We can respect personal agency while also acknowledging some folks have addiction problems, addictions problems be intentionally manufactured by products and platforms. There is a balance between allowing a poker game, and allowing the MGM Grand to plant a limo driver in a recovering addict's driveway.
We can respect agency while acknowledging those with large reach because of wealth can cause mass harm through media, influence and coercion if unregulated.
We can grant authorities to police and politicians without Qualified Immunity from consequences of their actions.