WTF has bareback got to do with it, you can catch STIs through oral sex and last time i looked OWO is a very common thing on here and not looked down upon. HIV, yes, pretty much only passed on through BB sex but to blame BB for the rest is ignorance. BB could disappear and you would still get STIs
Condoms will offer little protection from Herpes and HPV and limited protection from Syphilis. However they offer very high protection against HIV, Hepatitis gonorrhoea and chlamydia with penetrative sex the primary route of transmission. Unprotected oral is much lower risk in comparison but yes it is a risk.
However there is also a secondary effect in that theoretically if you could persuade everyone to use a condom for penetrative sex, you would massively reduce the total size of the 'active infection pool' thus lessening your overall chance of exposure and meaning the lower transmission routes such as OWO become even less of a risk.
Of course that clearly isn't going to happen unless perhaps another HIV type scenario comes along which proves highly contagious, deadly and with no treatment/cure.