1) While your target audience may not all read blogs, prospective staff/investors will. The other point is that blog adds relevant content which will help people find you who just use Google.

2) While the technology is a point, most agencies have either inhouse or a web developer then know who can setup wordpress. Its not that hard to make wordpress look great with a decent template.

3) If their business model is the same as everyone else’s they might as well shut the doors now and use the blog to sell the company property.

4) Your agency is too busy but everyone has 1-2 hours to do a post. No-one is that busy they can’t blog! Why not do a video blog 3-4mins and get someone else to help edit it.

5) If your an agency that can’t write you need to rethink how you manage to stay afloat.