It's astonishing to me that advertising and marketing is accepted as normal. The majority of B2C marketing is designed to manipulate people's emotions so that they act against their interests, in order to make you money. It's really disgusting.
And in doing so you can see that what you're saying is actually not true. Look up any random advertiser and you'll see that it's pretty uncommon for ads to be based around insecurity. Almost always it's on banal product features. The insecurity-focused ads do exist but they tend to be focused on a few broad lowest hanging fruit ad categories.
I don't know if you know this, but all Facebook ads as well as TikTok ads and so on are public on the internet. You can go to Facebook Ads Library. https://www.facebook.com/ads/library/?active_status=active&a...
And in doing so you can see that what you're saying is actually not true. Look up any random advertiser and you'll see that it's pretty uncommon for ads to be based around insecurity. Almost always it's on banal product features. The insecurity-focused ads do exist but they tend to be focused on a few broad lowest hanging fruit ad categories.