If you don’t even have that, well sorry, but I’m getting plenty of CVs through everyday.

If you have a full supply of well qualified candidates, good for you because you are in the minority. However, most company's candidates are garbage and the last ones you want to lose are the ones with three competing offers.

Tell them you need a code sample, don't make stupid decisions based on presence of a github profile if you want to hire anyone above a junior level.