That's neither what I said nor the stated goal of this regulation.
Theres tons of externalities ranging from increased political polarisation, mental health issues, increasing social isolation to the decimation of the traditional publishing sector. These socio-technical systems are some of the most complex ever built and we are barely scratching the surface of the challenges they are causing. It doesn't help that these platforms actively stop the collection of data on their platforms for research purposes (as they probably know it'll reflect poorly on them).
The platforms themselves have identified their content as a legitimate existential risk. Mostly due to how advertisers don't want to be affiliated with certain types of content. See the multiple rounds of demonitizations done by Google in the adpocalypse or Elsagate. Or Meta's crackdown on content post 2016/Brexit. Or Elon's current YOLO which has killed their advertising revenue.
The current status quo is that platforms govern their platform content through advertisers threatening to pull advertising budgets. I'd say you Americans are mildly crazy for regulating the reach of speech through informal negotiations by big advertisers and big tech, but it does sound on-brand for you guys. I find it pretty disgusting though, and I bet a lot of you Americans do too.
Anyways, the DSA in it's current form is largely revolves around increased transparency into data for researchers and mandated reporting processes around moderation decisions. More informed decision making can be made in the future while not relying exclusively on leaked documents from whistleblowers like Frances Haugen.