The "bot's" could be as simple as HR people doing ctrl-F and seeing how many keywords & buzzwords are hit, without actually reading anything (because they really don't understand any of the skills or technologies they're hiring for because they're HR, so they search keywords.) Or there is filtering software being deployed. Humans aren't reading through thousands of applications for a single position, for every position they have available. And depending on the company and field, they are literally getting thousands of applications per position.
Companies are using Applicant Tracking Systems. Hiring websites like Indeed and LinkedIn have pre-filtering abilities on top of that, so your application might not even get to the company's filtering systems. I'm not even talking about complex AI "tools" that are corrupting every other aspect of internet life. I'm talking about basic software bots that weed people. I know people in companies who do hiring; i know a recruiter who works with hiring managers and HRs for companies. They all have told me companies almost universally use software to filter out applicants.
There's
this gem of a story that happened recently.
Companies don't read hundreds or thousands of cover letters, resumes, and applications.
They use software to do it for them to get rid of as many as possible. Then the humans who do eventually read it further down the line want your cover letter and resume completely reworked to look like it's the only job you've applied to, because it's the only job you've ever wanted. (multiply all that work of rewriting your cover letter & resume times all the dozens or hundreds of jobs you're applying to.)
It's been like this for at least 10-15 years. Which is extra annoying because every time i'm looking for a job in that time, i waste countless hours of my life reworking my cover letter and resume for every single of a few hundred applications, plus putting the same exact info that's on my resume into their application page, only to 90% of the time, to get a job through someone i know.