I once read the hypothesis that if you're spamming, scamming and phishing, you're trying to trick people who aren't paying attention, are inexperienced and are curious. For that target group, the exact text doesn't matter. In fact, the more you do your best to make the email look professional, the sooner the people who are good at filtering signal and noise, will call you out. There might be an advantage to looking like an inept predator: the real watchmen will shrug and think "who would fall for that?"