True.
But I can't play like that. Or I used to be able to play like that. But now I want to play with strokes.
I've been really sucking playing doubles lately. Can't ROS. Can't maintain a cc rally. Missing easy volleys.
Gonna practice singles today. Maybe that'll make me feel better.
I hear you on the strokes ... it gives me something to distract myself with as I get slower, and slower ...
In my 20s and singles tournaments ... it was almost all singles, not a member of a club yet. I really can't remember any "just hitting", or drills. When you were not a club member, you looked forward to your matches that you could arrange. I was lucky all the way with enough players/friends to play singles with ... high school team, college friends at college that carried into early 20s after college. Then singles tournaments 24-25ish and new set of players/friends ... but still mainly played matches.
Club membership by early 30s, mainly doubles (2-3 permanent indoor court time/doubles a week), one drill group a week with mostly USTA teammates. The drill groups were not about technique, strokes, grips ... they were doubles play points drills. I don't remember a lot of serving and ros ... so mainly cc drills, approach and net play, back pedal for overheads, etc.
In hindsight after ttw:
I would divide "tennis improvement" into two big buckets 1) winning matches 2) the rest ... technique, strokes, grip, footwork, cardio, etc.
IMO ... if you have limited time (say once or twice a week), and your number one goal is winning matches, nothing will be better time spent than playing "quality" matches. If your goal is to win 4.0 singles tournaments, and you have limited time per week ... play practice singles matches against players that force you to hit a lot of balls, and enter every 4.0 singles tournament you can.
If you have more time, no doubt add drills (either cooperative drills with another player, or group drill). To me, cc drills are priceless ... for singles or doubles. Same with overhead and volley drills.
I have mixed feelings about rec players serving too many baskets of serves, but none at all with ros drills. For me, anyway ... particularly doubles ... I would have benefited more from regular ros drills than serving practice. That said ... you ros against a lot of different players, hard to replicate that in a drill. BTW ... that is why playing tournaments or USTA is actually practice ... mutiple styles and techniques. You don't play your buddy or coach over and over.
So for me, to answer your ratio question, I would first ask how many times a week do you play, and do you have the ability to play quality/useful matches.
If you can only play once a week, play matches. Twice a week ... maybe one match, one practice ... but I would lean towards two matches. Three times a week ... for sure one drill group/practice a week.
@nytennisaddict pointed out another consideration ... seasons, winter indoor limits, time of year you play tournaments or USTA.
Strokes, technique, footwork ... separate ... coach, instructor, ball machine, drills and reps for new/changes. If you can only bet on one 1) changing strokes ... OR 2) playing a lot USTA/tournament matches ... to move up a level, play a lot of matches. I do think stroke improvement has more upside in singles than doubles. If we call a serve a stroke ... that stroke improvement obviously has big upside to both.