My background with swimming is dangerously similar.
I was pulled from my family pool and given the kiss of life when I was 5. While I could swim, I was never confident in the water or a swimmer at all. I could swim to the raft at the beach and splash around, but the raft was always further away than I would have liked.
In my early 30’s a running buddy got me into swimming. He claimed there was too much snow on the roads, to run, so we hit the pool. Embarrassing is an understatement. I could not accept that I was such a bad swimmer so I worked on it all winter.
In a similar fashion, I went the Total Immersion way (back when Terry gave away his ideas for free on the old Rec.Sport.Triathlon discussion group) and the simple concept of reducing drag was the key for me. I sped up a huge amount in next to no time. I went from 30+ min for an Oly swim to sub 23 in just a few months. I eventually got as low as 21 minutes before I switched to IM distance.
While I agree that with swimming, technique IS the key, I don’t think you really made it clear WHY it’s the key. With running, you run on a relatively solid surface, getting good traction so “more” running is mostly what you need to get better. Similarly with riding, it’s sorta the same, but due to wind resistance at higher speed, there is a limit to how effective “more” will be. As demonstrated by triathletes use of aero bars on tri bikes, the technique of the aero position can get use going just as fast as a good cyclist, with less energy, or at the same power output, go faster. This wind resistance hints at why swimming technique is so important.
Due to the density of water being soooooo much greater than air, it’s vital to reduce drag to go faster when swimming. It takes a lot of energy to push all that heavy water out of the way. By being more streamlined in the water, you have less water to push out of the way. It’s that simple. It is only with good technique that one gets faster at swimming. There are two vital areas of concern. First is to reduce drag as much as possible. Primarily this comes from good body position. If you’re not able to maintain a good position, you’ll just go slower and slower. Once you’ve got that sorted, and only then, can you worry about power. And it’s not so much about power generation, it’s about how efficiently you can get that power into the water.
It’s like a tug boat. They have huge amounts of power, but because the are unstreamlined lumps in the water, even at full power, they won’t go very fast. A long skinny rowing skiff, with less than 1hp rower in charge, will go surprisingly quickly, simply because drag is reduced so much. Reducing drag is key, then work on improving (effective) power.
yes, it’s important to have good technique in the water, but it’s important to know why it’s so important.