I could never attain the accuracy for pinpoint casting with spinning gear that was attainable with baitcasting gear. But, tossing weighted popping corks with bait or jig heads or rigs with slip weights a mile in the wind is easier with spinning gear. I never liked the balance or feel of spinning tackle so I went with low profile baitcasting reels no matter what the situation. But I almost never liked fishing popping corks so I don't think I suffered from using baitcasters.
I've never seen anyone tossing spinning gear be as accurate as someone good with a baitcaster. I'm not saying it's impossible to be pinpoint accurate with a spinning set up, I just haven't seen it. If I'm sight casting or trying to hit a spot around structure like oyster reef, I'm choosing a bait caster or a fly rod for the potential for hitting the spot. A spinning reel set up would be a distant third. But really light weight stuff works better with spinning tackle or a fly rod than a bait caster. And stuff with a weight below and above, like a weighted cork, works better with a spinning set up.
You could actually carry both likes lots of folks. Get good with the baitcaster for the nail your spots work and then reserve the spinning gear for when it is at its potential best.
I like karstopo's idea about carrying both; I can think of a few circumstances where one or the other is really required. But, for what is being described in the original question, this would seem more spinning gear oriented, certainly if any wind is expected.
Since most anglers here appreciate an "artist' at work, know one when they see one, here is a Daiwa clip (in Japanese) of a guy using spinning tackle and casting with great accuracy. There are some guys with casting gear who are equally impressive.
Brad
Pinpoint spinning reel accuracy I think those very light spinning set ups like in the video are the sweet spot for spinning gear, They are a lot of fun on small water and you just can't do that with any baitcasting set up using very light tackle. The bigger spinning reels sit so far off the rod they feel unbalanced to me. I feel much more in control working a topwater, suspending plug or jig head plastic using a low profile baitcasting reel.
When I want to go light tackle, finesse type offerings in the inshore salt water, I'm choosing a fly rod over spinning gear. A fly rod does better on accuracy and distance with unweighted or lightly weighted patterns than light spinning tackle and has the uumph to handle bigger reds and other fish that one might come across. For the last 2-3 years, I'm using the fly rod 95% of the time in inshore bay and marsh fishing.
It may be the Indian and not the arrow, but there has never been a uniform bow and arrow across cultures. Some bows like the Mongolian bows excelled in mounted work. The English had their powerful long bows for armor piercing work. I guess everyone has to work out what works best for them and the style of fishing they like. All we can do is offer up our experiences using various methods. Spinning tackle seems to rule in most of the country, but baitcasting set ups are making inroads in nearshore salt water outside of Texas. Fly rod tackle is on the rise in the salt as well. Spinning tackle is pretty beginner friendly. Baitcasting takes a little more work to get fairly proficient with it. Casting and line management with a fly rod requires even more time to get it down.