I literally never use Rs, I don't want them getting their gross peasant stats near my better characters.
Additionally, if you'll recall the thing I said in the post you just quoted, **the first two teams I created had no such assistance**. I had a Beelzebub from the pre-reg and the rest was all just whatever happened. That team can still crush the Event without any trouble, and I never even bothered farming a decent weapon grid for it. If I had put time into any of the given teams rather than just throwing them away when I got bored with them, they'd be exponentially stronger. And yet they still currently meet or exceed the needs of the content we have.
By the time the early game transitions into the late game a player will have had more chances at the gacha, more event equipment, and more Legendary Souls unlocked. But in the conversation I jumped into you're talking like if someone picks the wrong first Legendary they might as well throw away their account. I'm using the example of "literally any trash team being usable" to show people that no, it really isn't that big a deal and it probably won't be for some time yet.