Websites get bloated because the companies aren't aware of all the tracking going on in the first place. What usually happens is that the marketing team signs

Websites get bloated because the companies aren't aware of all the tracking going on in the first place. What usually happens is that the marketing team signs a contract then developers copy and paste a JavaScript snippet to embed on the website and move on. The work arounds require much more intention and the solutions can be hacky like modifying urls in a minified JS file. If that tracking is blocked, it is invisible to the company especially if only the third party who has access to the data.