Why not use the SRV record which has been created for this purpose, advertising seervices, specifically and use port 11371/tcp which has been registered with IA

Why not use the SRV record which has been created for this purpose, advertising seervices, specifically and use port 11371/tcp which has been registered with IANA for OpenPGP HTTP Keyserver? Why create new non standard mechanisms when these already exist? One could even use a different port and protocol with SRV records.