Your approach would be worthy of a separate post. I, like, pastorbob, would never consider consider laying track without rail joiners. But, as you say, they are prone to failure. If they are not soldered, they will surely fail after ballasting when the glue gets between the rail joiner and the rail. And, they do come loose over time from expansion and contraction.
When you think about it, there is no reason to use rail joiners from a track alignment viewpoint. If you lay your track carefully, and align it correctly, you should have no problems. The one remaining issue with rail joinerless track is the need to place feeder wires on each and every separate piece of track.
My brother-in-law, now deceased, got me into HO about 7 years ago. He had been building layouts for 40 years or more. He never used rail joiners, and his solution to the feeder wire issue was a very time consuming and labor intensive technique that worked quite nicely. He drilled a small hole through the side of every rail (about 1/8" in from the end of the rail) and inserted a piece of steel wire shaped like a staple to connect one track to another, then soldered those connections.