If I'm going to buy software from a website, what matters is quality information architecture and UX, which could be presented in any number of ways.
"Don't make me think"... next you'll be wanting all your restaurant menus to follow the McDonald's menu style guide.
"Thinking" doesn't need to be an annoyance. Promoting "you don't need to think" might even backfire. You're ignoring the benefits of standing out as unique. Leaving a lasting impression however small, can be the difference between earning respect or being seen as playing it safe and therefore a clone in the consumer's eyes. Clones are expendable.
It's a fine line, a balancing act that sorts the confident websites out from the copycat yawn-fests. Take the risk I say, but it's a philosophical difference.