Tor is not a run of the mill SOCKS proxy, not least in that it inserts arbitrarily high latency into the user data path. On the other hand, an actual run of the mill SOCKS proxy would have visibility of the user's queries and their identity, defeating the purpose of the design.
> an actual run of the mill SOCKS proxy would have visibility of the user's queries and their identity, defeating the purpose of the design.
Why would it have visibility of the queries? If I send a TLS connection (containing my DoH query) through that SOCKS proxy, then the SOCKS proxy is unable to decrypt that TLS connection without breaking certificate verification and thus can't read my DoH query.
