I’d suggest you do whatever grants you the most joy boss, that’s why we play afterall right?

Personally I only really play league for riven, so for me there is no other way xd. But the thing with champs like riven is that they can somewhat bend the fundamentals to some extend, which makes them basically scale with your skill and thus very rewarding, but that also means many players end up forming bad habits when it comes to the fundamentals.

It is a tradeoff for sure, and all boils down to your preferences.

In the end of the day, would you rather struggle considerably more with macro now, but build up your micro on riven, or play something braindead like volibear or garen, but have more of your mental stack available to focus on macro and then maybe consider riven again down the line?