Sure is, feel free. A solid base of clear, well-defined, consistent, playable, balanced rules is certainly a good thing to aim for and very nice to have. It's a valid game-design philosophy, and in any game other than an RPG, you probably wouldn't get a lot of push-back for expecting such qualities in a game. RPGs though, seem to really /need/ a DM, no matter how much effort goes into the system design. At some point, a designer has to ask, 'what - who - am I doing this for?' If you can assume a good-enough DM using the system, you have less need to build difficult-to-achieve qualities into that system, you can focus on other aspects of the design than the details and interactions and functionalities of the system - like the Story, 5e's stated emphasis. Easier or even possible, with a given skill set. Given a system you know won't be modded much - whether it's a 'solid' system or an easily 'broken' one - you can develop and apply system mastery to get a better character. That's a certain kind of skill. OTOH, given a system you know will be heavily DM-moderated, you can cultivate the relationship with the DM to achieve much the same result. A different skillset. Depending on your relative talents, one may well be much easier than the other. But which way you go is as much about the 'table-culture' you're playing in as the system. A DM could run 4e or 3.x with flagrant disregard for RaW and just rule as he likes, or run 5e or 1e (madness!) strictly 'by the book' (even if the book strictly tells him not to run strictly by the book). As a player, I understand the concern, but as a DM, I feel that is the kind of concern it's the DM's responsibility to address, especially in a game like 5e. A good DM will work with a player to provide them what they need to play the character they want. If that's guidance as to how some things that are vague in the rules are likely to work, so be it. It's no guarantee (even in the most tightly-defined RPG, the DM could whip the RAW right out from under you at any time), but it's better to have it out there.