An escort has more sex than a client, therefore he takes more chances sleeping with more guys.
@studchaser was simply using a metaphor.
We shouldn't turn this into they versus us! We're all in the same boat whether we have sex once a month or on a daily basis, as pointed before in this thread the only safe sex is no sex.
PrEP (and to a minor point OraQuick home testing) have changed the game yet they're not 100% effective and we must get tested for other diseases that may not have symptoms and are treatable with antibiotics.