Certifications do add value to your resume — particularly for clearing automated resume filters and signalling platform-specific knowledge to hiring managers. The companies that value them most are larger enterprises and those with formal HR screening processes.
The issue is not certifications themselves but how people use them. Treating a certificate as the end goal, rather than a milestone within real learning, leads to candidates who can pass a multiple-choice exam but freeze when asked to debug a broken pipeline. Recruiters at good companies are very good at spotting this.
A candidate with a Databricks cert and a working Spark project is significantly more attractive than a candidate with only the cert. The project is what makes the cert credible.