It's a shame that ICANN is polluting the internet like this.
Plus, what's actually wrong with vanity as far as what domain points a website? What is the benefit in having fewer TLDs?
User confusion for one.
The only use case where domain name is actually used is when you need to tell someone to go to some website or give them your e-mail over the phone. Especially if it's your website. New TLDs are still fresh and people get confused. If it doesn't end with .com, they want to add .com themselves. You need to spend time and energy explaining - which would take a lot longer than just having an extra word in proper .com domain.
I guess people will get used to new TLDs in time. But that time is yet to come.
I wouldn't worry about that too much. The general public concept of the Internet is really not all that old (15-20 years). People will adjust remarkably quickly.
what i have been noticing my redirect to search on unknown domain names has been failing more and more, cause is that there are too many domains other so if I type "domain names dog", browser can't send me to google anymore to find if there are domain names .dog, I just get host not found error. Granted this is not how most users use firefox host tab. However it is clear case where corporate greed breaks organically grown infrastructure, in our office we use 8.8.8.8 and thats how I know about it.
Domains can't have spaces, so if you type as such, you'll still get a search in any browser (that has search-in-URL-bar enabled, of course).
What kind of realistic search query without spaces and ending in ".dog" do you see yourself doing?