You're the first person to tell me accreditation or clearances are a negative, but maybe we apply for different jobs. I'm going to continue to believe the opposite until you show some evidence.
I think we have all seen resumes where there is an alphabet soup of certifications and a lack of real projects or positions. But if they just have a cert casually listed near the bottom, it's usually a compliment to the work they were already doing in that area (and maybe their employer paid them to go and get it)
Also for the companies that need security clearances, I've seen plenty of job postings that have security clearances are required (or the job is contingent on your ability to get one). I'd be surprised if that wasn't still valued.
As were bootcampers, which is similar I guess.