No. They don't use it to blend in. If they wanted to blend in they would be modifying every platform's user agent string to look like Windows x86_64 or something. They don't do that because there's no way they could possibly get away with it.
Instead, they're resigned to simply censoring the minor version number of the browser to reduce entropy.
> Fun fact, non-browsers actually have much nicer user strings. I run an internet radio, and there is a lot of clients like
And those tools will get blocked by various CDNs for not having a browser user agent string, not having a browser-like TLS handshake, etc. This is why projects like curl-impersonate and golang's utls had to be created.