Plus the fact that when the Bible talks about “modesty”, including the passage this guy wants women to read, it means “don’t flaunt your wealth”, not “don’t expose too much skin”. Also, if someone’s dress is causing him to lust, the Biblical remedy is for him to gouge his eye out, so…

It wasn't until about the 1940s and 50s that it became increasingly common to see men wearing t-shirts in public. The style ascended partly because it was sexually suggestive (think of Marlon Brando in The Wild One).