That's either a good thing: because they grew-up with database libraries designed to encourage, if not force, the use of parameterized queries, so it was never a problem for them.
...or it's a bad thing, because they grew-up in the early-days of PHP 4x, learning from PHP/MySQL tutorials written by people who'd today be considered utterly unqualified to speak at length about programming: the kinds of things that only happen when the blind were leading the blindfolded: nightmares like actively encouraging concatenating $_GET values directly into mysql_query() strings because it means having less variables, and less variables means better performance (right?!) - and they never learned otherwise.
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I have a pet theory that people who got started with PHP in the 2000s who are still working today are so burned from their earlier experiences that they're now the most detail-oriented and best-practices-following programmers around, regardless of the language they use today - while the people who never experienced hardship (to the extent that having to use PHP is a hardship...) become complacent, and our ever-increasing reliance on unvetted external dependencies (in all language ecosystems, imo) is going to end badly.
Or not. No idea, honestly!
I ask about SQL injection pretty regularly, and it's scary how many devs don't seem to even know what it is.