Technically yes, but depending on how complicated your blog posts are the exported files probably won’t be perfect. The exporters are also more difficult to configure and use than a typical WordPress plugin.
The original exporter mentioned in Kirby’s docs might (?) still work with the current version of Kirby, but images won’t be exported.
Last year Sally Jenkinson created an exporter that appears to be better and exports images, but I haven’t tested it.
If you decide to try one of these exporters be sure to back up your entire WordPress site first and follow their directions closely. If you only have a few dozen blog posts it may be worth it to just recreate them manually to ensure that they’re perfect and learn Kirby’s syntax while doing so.