That's the point. SSL/TLS is a standard feature nowadays. If you're a web host and you don't support certs or charge some unreasonable fee for adding them (and I'm well aware there are far too many of these out there), then you need to be losing business fast. Your customers should be moving to better competitors. This measure just accelerates this process.

You're leaving your users vulnerable because you can't be bothered to do things correctly. You are not the wronged party here, they are, and you're just finally being pushed into doing it right.

Any web host that doesn't offer SSL by default, for free, is offering an inferior product. I worked on my university's web host from 2006-11 and we put a lot of work into making sure people could use HTTPS whenever they wanted, despite technical limitations (mod_vhost_ldap and SNI don't play well together), and that was a volunteer project, well before the current era of free certs.

If this change convinces people not to use commercial web hosts that don't offer SSL, it will have done a good thing for the web.

Err, I work for a web host and we offer SSL by default as part of the onboarding. Speak for yourself :).