I'm not arguing anything, I'm telling you what reality is.

The reality is that 99% of web developers all use the exact same browser, and it isn't Chrome or IE or any one browser its "whatever is the most popular browser currently" (really it's "most popular for your customers but 99% of companies have customers who use the same browsers as everyone else).

You can bury your head in the sand and say "oh the mean web developers aren't using my pet browser" ... but it won't change the fact that no one wants to test on an unpopular browser, then test again on a popular one: EVERYONE is going to test their site with the browser most likely to use that site.