I mean, you do you, but it seems that if you were actually interested in the truth you'd have a blind-interview strategy where you interview and judge based solely on the actual interview not knowing about their certificate status a priori.
Note: I don't have a lot of certs (I don't even know that the couple I do have are even up to date, nor on my resume), but this kind of response I see quite often and it feels quite smug.
I find the process of going through the effort to get a cert quite valuable, as it exposes me to aspects of <subject> that I probably would have not hit just "spending my free time on work-type projects", which is another red flag for me as an interviewee. I've been a dev my whole career spanning 30+ years, so I get the desire for "fire" and "passion" for the craft, but as soon as someone asks about what I do OUTSIDE of work that could be brought to bear for work stuff, I'm out. I can see what kind of company they are representing.