Small consulting site but still getting leads?

[Skybal]

I checked a consulting site called ultrastrategy earlier. Honestly the site is very basic. Few pages. No blog. Almost no SEO content. I expected something bigger for a strategy consulting network. But a colleague told me he actually booked a call from that site not long ago. Just the contact form. That made me pause a bit. I built a small consulting landing page recently with way more content and it barely converts. Maybe simple works better for B2B like this. Hard to tell. Curious how to handle lead gen for consulting type sites.