If this person was laid-off on Jan 1st and spent one hour on each application, that averages to 12.5 hours of non-stop job applying every day for 197 days straight
10 minutes? To find the position, see if you fit, customize your cover letter and resume to well fit, and go through their portal? I could see maybe with aid of a GPT this being possible nowadays but still non-trivial.
I generally change jobs every 2 years for the last 15 years. I have never used a cover letter. Your mileage may vary but I think they are generally ignored.
I can't think of a position I applied for that I didn't spend at least an hour working on the initial application. And an hour would be fast-tracking it.