I'm not saying that they are. As a pragmatist, and as an unfettered machiavellian true-neutral byronic pseudo-sociopath nominal hero, I recognize the practical choices that get me the results I want are usually the 'paragon' things that you might consider moral (I don't think any renegade option that achieves more than a paragon one is immoral, since I base my morality on results alone rather than on actions and the spirit behind them).
The problem is (and you're deliberately ignoring this for the practical aspect I've noticed) that the game doesn't define it in terms like what you're saying. It's purely ideological, and yes, the game is trying to shill the paragon route as the better option all the time. The game is very heavily ideologically biased.
It is a scot-free get out of jail card with nothing behind it. Don't ever say that being a paragon is hard and arduous in the ME games. That's not representative of how the game portrays it, and is more of a reflection of your personal opinion behind the ideal. The game makes it clear that if you stick to your (conventionally moral) conscious, you'll prevail. Others are stating that they wished to see it differently.
Personally, my opinion is why take the long and hard path when you can take the quick and easy one? As long as my goals are met, I have a clean healthy conscious.
What am I deliberately ignoring exactly? That paragons are impractical? Sure, to a certain extent, but then so are renegades, sometimes, I mean, it isn't sensible to kill off certain things and forfeit the chance to achieve better results
Shepard puts himself and his team in danger to rescue a quarian admiral in order to secure peace, I call that hard and arduous. You may assert that renegade actions are hard and arduous also, if you so choose, but you cannot tell me that I could not use the same words to describe a paragon
Others want the reputation meter gone, because dialogues, interrupts and actions were contentious and mislabeled, but this has nothing to do with defining "paragon" and "renegade" generally
By the "sticking to moral convention" statement I assume you meant people who got worse-off for flip-floping between moralities? I guess the removal of the reputation meter could fix that. You couldn't have meant that the game makes sticking to the paragon path is the only way to get things done and prevail, right?
Well, that is the question you should ask yourself, WHY take the long and hard path? WHY do it? Simple, be stronger, be better
I do agree with you that the game is heavily biased towards paragons, with respect to the imbalanced accessibility and consequential weight