Not worth it
Following proper proceedures,there's nothing to "chance". Keeping all your equipment clean & sanitary is all that's needed. Just sanitizing the hydrometer,cylinder,& spout on the spigot is plenty for the OG sample. Wate not,want not. Minimalizing the number of tests is something I practice as well.
I wait till 2 weeks...sometimes 3 weeks to do an FG test. wait till the 3rd day,& test again to see if it matches. When it settles out clear or slightly misty,I bottle it.
This sort of testing idealism has little to do with off flavors showing up in the bottle. That's conditioning & carbonation bring out some off flavors & smells. They're usually masked or mistaken for "green beer" early on. After some carbonation & conditioning,they come out. This can be from under/over pitching,high ferment temps,old malts,etc. Again,making sure anything that touches the beer was propwerly cleaned to begin with,& sanitized right before use will ensure that the bottled beers come out as they're expected to. I think this don't chance it thing with hydrometer samples is just another boogiman,all other things being properly cared for.
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