I've been there, (not exactly but in a similar situation) it's just something to stick on your resume. People get massively over excited if they hear you worked at one of the big tech companies. The automatically assume that everyone who works there is a super genius. This even works for Microsoft employees.

This happens because recruiters never know anything about the industry that they're recruiting for, so they're just looking for easy hints and "worked at Meta" is a good, if not particularly necessarily accurate, hint that this person knows what they're talking about.