That's why you have a key hierarchy. To provide high level of security for one's asset while also allowing for convenience of use of the social parts. We can give users both, which is one of the biggest success factors Steem have.
So no, I don't buy for a second that it has to be more secure. It should offer the opportunity to have cutting edge security, not insist on it even for those who don't want it.
Eh, I'm going to disagree with this because I feel like it sets users up for failure if they choose a lesser security. Because if/when something goes wrong (and they inevitably will), their word-of-mouth about how horrible an experience they had on this "scammy" platform is a powerful force which might keep potential new users from signing up. Besides, with the "customer" in mind, I don't consider "it's too secure" to be a valid complaint. That's like complaining that the safety ratings of a vehicle are "too high".