This is something I think about a lot. I'm an attractive man, so i frequently get the attention of 6's and 7's in very obvious way. i've had a 6 at a party straight up tell me "i want sex".
I'm split with indecision, because on one hand, nothing irritates me more than my chode AFC friends that CONSTANTLY look at 8's and say sh!t like "ehhh she's okay, but her face is too long...". I'm like REALLY DUDE. This girl is cute, i'd love to put my penis inside of her. Your standards are so high that you need a 10, but when a 10 rolls around there's no way in HELL you're gonna have the balls to open her. Heck, you can't even reliably bag 7's and 8's so why are your standards so high? Oh thats right...because you need an excuse to pansy out of talking to them. So on the one hand I want to go after 7's to eliminate this mindset, increase my experience, etc.
HOWEVER. Sometimes i find myself gaming girls that don't turn me on, ones that i know aren't up to my standards. I've been on dates and I honestly feel BAD because i'm gaming this girl well, and making her fall for me, when in reality she doesn't have a chance in hell. I'm just doing it for experience. I know. I know. Women don't think twice about leading a man on and then going completely ghost on him.
I think of it like weight training. A 6 or 7 is like working out half ass and just basically going through the motions. Sure, it's better than just sitting on your ass playing video games, but then again, couldn't you have better used that time doing something even more productive or actually pushing yourself in a workout?
Gaming a 9 or 10 is like going balls to the wall and experiencing massive pain and stress in the gym. It hurts a lot at the time. You don't want to do it. Much like how you can feel very nervous, intimidated, and unsure when gaming a superhot girl. But...this is what progress feels like. The times i've made the most progress have been when i've just been crazy nervous. One of the first times i was able to get a number from a super hot girl, invite her over for a date, I was so nervous. I was sitting there, smoking hookah, and I can tell she's into me. I could tell I needed to go for the kiss. I was shaking. My hands were actually trembling, but I pushed through it, put my hands on the couch so she wouldn't feel them shaking, and went for it. I went on to have a great night, and once i got that out of the way, it was like the nervousness had exited my body and I later went on to date her a few weeks and bang her.
If you're sitting with a 7 and it's not stressing you out, and you're going well. Then step your game up. Many newbies will be fine gaming 6's for a while because gaming 6's is harder for them than the previous lack of pootang they had. But once that is too easy, like in weight training, you need to step up the resistance or you won't make any gains.
So in summary, sure. Go for that 7 once in a while, even if it's easy. It's useful for experience, and very useful because it lets you have an abundance mindset. When you have like three average girls that you're sleeping with, it can make going up to 8's and 9's at the bar that much easier. And believe me, getting shot down by hot girls repeatedly can hurt your ego and make you want to crawl back to the average girls. But never fail to push yourself. You're going to make much more progress when you're extremely uncomfortable.