I agree, however it would be of no added complexity for their visitors, if Watchman self-hosts his email server, had a contact form on his website and also offered a Simplex address with the advice, that Simplex is easy to install and probably the most secure way of contacting him. 

As for self-hosting the website and not using Google Fonts or cloudflare that's even more of a no-brainer as his visitors would not even notice that but still benefit from them not being tracked on his websites. 

So I do agree with @SimplifiedPrivacy.com Podcast's points.