If you don't like the dipstick get a better one.

We're for simplicity. Our entire vessel is set up with that concept. Any added item is something else that may fail. For a cruising boat a failure on a fuel tank gauge is not a good thing. Think making a 300 mile passage beating into a really uncomfortable sea and deteriorating weather using the engine relying on a gauge that's not reading correctly and running out of fuel at 1/4 tank. ( I know, it's a sailboat but if you run out of fuel you'll be miserable trying to get to your destination not to mention that it's just not safe. )

We use a dipstick with a chart of inches versus gallons next to the hole we drop the dipstick in. It can't give us an incorrect reading. We like that. If we had a fuel tank with a gauge and were preparing a passage we'd still drop a dipstick in. We like checking the inches, correlating that to gallons and dividing the gallons by consumption coming up with hours of engine run time.

Of course with our cruising style we motor at least half the time.