Yh I know, i'm just saying it's best to tell yourself you can not assume you can't, and pretty much do everything possible. I thought oh no I can't do that, but if you work at it long enough you find a solution eventually. Every time you do that your balls get bigger. I don't mean to be a dick, but if you just let people say whatever they want and treat you however they want, they'll put you right in the gutter.
Nobody is putting you in the gutter. When you ask a question on a forum you can't just expect to get positive replies only. If you don't want to hear anything negative then dont ask people's opinions.
You need to be confident that you can do the work, including testing and certifying.