The wide-spread production practice of calling C libraries from dynamic (and other) languages is pretty much eating the world.
The naysayers are being tripped over and trampled by throngs of doers.
There are excellent reasons not to write the whole darn program in C, just because it happens to need a SHA256, CRC, access to graphics, or some number crunching or whatever.
Or just not bother with the Lisp at all.
It's an easy choice.