It depends on the level of the mismatch an whether the LD recognizes / understands the HD's desires / needs.
In my case my wife doesn't believe my desires for sex are reasonable, so she sees no reason to provide a quickie. It sounds like other people (men and women) here are in a similar situation.
If its a mild mismatch and the LD is willing to help, then I think quickies can be great.
My wife is an all or nothing kind of person, so quickies, for us/her, don't occur because there's no time, or as an 'extra' throughout the week, or for my benefit. Instead, it's what she actually wants at the time (which is fine, sometimes quick and hard is good), but as I said, it's not a 'bonus session'.
Same with HJ's or BJ's - they don't happen. There's really no desire or interest in my needs when I'm in the mood.
The funny thing is, she recognizes this and actually seems to understand where I'm coming from, and agrees it's not 'fair', yet nothing changes. If she's not in the mood, then it's not on her mind at all. Back in the day, I'd ask, or hint - and not in a demanding or degrading way, yet the response was almost always the same. I can count on one hand (no pun intended) I've received stand-alone anything.
We had an in-depth discussion about it many years ago, and it solved nothing, and even probably confused me more. Her general response was that if she wasn't getting anything and it's one-sided, she had no interest. So I said don't worry, I'll take care of you, too (either at that time, or a later date, for example) and it'll balance out. Nope.
So for some people, it's literally all or nothing. If she's not in the mood, and flat out refuses to GET in the mood, nothing will happen. She recognizes this, too, the one-sidedness of it all, that sex is, quite literally, on her terms, her schedule, and she won't even allow herself to get turned on with short notice, on-the-fly, whatever.
It's a good thing the sex is good when we have it...